79259681 has 2 divisors, whose sum is σ = 79259682. Its totient is φ = 79259680.

The previous prime is 79259671. The next prime is 79259689. The reversal of 79259681 is 18695297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54169600 + 25090081 = 7360^2 + 5009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79259681 is a prime.

It is a super-2 number, since 2×79259681² = 12564194064443522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (79259689) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39629840 + 39629841.

It is an arithmetic number, because the mean of its divisors is an integer number (39629841).

Almost surely, 2^79259681 is an apocalyptic number.

It is an amenable number.

79259681 is a deficient number, since it is larger than the sum of its proper divisors (1).

79259681 is an equidigital number, since it uses as much as digits as its factorization.

79259681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 47.

The square root of 79259681 is about 8902.7906299093. The cubic root of 79259681 is about 429.5536760670.

The spelling of 79259681 in words is "seventy-nine million, two hundred fifty-nine thousand, six hundred eighty-one".