Search a number
-
+
11791009 is a prime number
BaseRepresentation
bin101100111110…
…101010100001
3211012001020001
4230332222201
511004303014
61100420001
7202136056
oct54765241
924161201
1011791009
11672383a
123b47601
13259ab39
1417cd02d
15107d974
hexb3eaa1

11791009 has 2 divisors, whose sum is σ = 11791010. Its totient is φ = 11791008.

The previous prime is 11791007. The next prime is 11791037. The reversal of 11791009 is 90019711.

It is an a-pointer prime, because the next prime (11791037) can be obtained adding 11791009 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9941409 + 1849600 = 3153^2 + 1360^2 .

It is a cyclic number.

It is not a de Polignac number, because 11791009 - 21 = 11791007 is a prime.

Together with 11791007, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11791007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5895504 + 5895505.

It is an arithmetic number, because the mean of its divisors is an integer number (5895505).

Almost surely, 211791009 is an apocalyptic number.

It is an amenable number.

11791009 is a deficient number, since it is larger than the sum of its proper divisors (1).

11791009 is an equidigital number, since it uses as much as digits as its factorization.

11791009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 11791009 is about 3433.8038674333. The cubic root of 11791009 is about 227.6059740546.

The spelling of 11791009 in words is "eleven million, seven hundred ninety-one thousand, nine".