Search a number
-
+
118909000081 is a prime number
BaseRepresentation
bin110111010111110000…
…1110101100110010001
3102100220222021001222001
41232233201311212101
53422011201000311
6130343120314001
711406450552424
oct1565741654621
9370828231861
10118909000081
114647a0377a3
121b066472901
13b2a01680a1
145a804ab9bb
15315e2eb4c1
hex1baf875991

118909000081 has 2 divisors, whose sum is σ = 118909000082. Its totient is φ = 118909000080.

The previous prime is 118909000073. The next prime is 118909000087. The reversal of 118909000081 is 180000909811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118204628481 + 704371600 = 343809^2 + 26540^2 .

It is an emirp because it is prime and its reverse (180000909811) is a distict prime. It is also a bemirp because it and its reverse can be mirrored producing other two distinct primes, 180000606811 and 118606000081.

It is a cyclic number.

It is not a de Polignac number, because 118909000081 - 23 = 118909000073 is a prime.

It is a super-2 number, since 2×1189090000812 (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 118909000081.

It is not a weakly prime, because it can be changed into another prime (118909000087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59454500040 + 59454500041.

It is an arithmetic number, because the mean of its divisors is an integer number (59454500041).

Almost surely, 2118909000081 is an apocalyptic number.

It is an amenable number.

118909000081 is a deficient number, since it is larger than the sum of its proper divisors (1).

118909000081 is an equidigital number, since it uses as much as digits as its factorization.

118909000081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 37.

Adding to 118909000081 its reverse (180000909811), we get a palindrome (298909909892).

The spelling of 118909000081 in words is "one hundred eighteen billion, nine hundred nine million, eighty-one", and thus it is an aban number.