Search a number
-
+
72139411 is a prime number
BaseRepresentation
bin1000100110011…
…00001010010011
312000202001200001
410103030022103
5121431430121
611054110431
71534113661
oct423141223
9160661601
1072139411
11377a2453
12201ab417
1311c3a556
14981bc31
1564ee991
hex44cc293

72139411 has 2 divisors, whose sum is σ = 72139412. Its totient is φ = 72139410.

The previous prime is 72139349. The next prime is 72139439. The reversal of 72139411 is 11493127.

It is an a-pointer prime, because the next prime (72139439) can be obtained adding 72139411 to its sum of digits (28).

It is a strong prime.

It is an emirp because it is prime and its reverse (11493127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72139411 - 223 = 63750803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72139411.

It is not a weakly prime, because it can be changed into another prime (72139451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36069705 + 36069706.

It is an arithmetic number, because the mean of its divisors is an integer number (36069706).

Almost surely, 272139411 is an apocalyptic number.

72139411 is a deficient number, since it is larger than the sum of its proper divisors (1).

72139411 is an equidigital number, since it uses as much as digits as its factorization.

72139411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 72139411 is about 8493.4922734998. The cubic root of 72139411 is about 416.2850975765.

The spelling of 72139411 in words is "seventy-two million, one hundred thirty-nine thousand, four hundred eleven".