79945850969 has 2 divisors, whose sum is σ = 79945850970. Its totient is φ = 79945850968.

The previous prime is 79945850807. The next prime is 79945850977. The reversal of 79945850969 is 96905854997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52658775625 + 27287075344 = 229475^2 + 165188^2 .

It is a cyclic number.

It is not a de Polignac number, because 79945850969 - 2⁸ = 79945850713 is a prime.

It is a super-2 number, since 2×79945850969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79945450969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39972925484 + 39972925485.

It is an arithmetic number, because the mean of its divisors is an integer number (39972925485).

Almost surely, 2^79945850969 is an apocalyptic number.

It is an amenable number.

79945850969 is a deficient number, since it is larger than the sum of its proper divisors (1).

79945850969 is an equidigital number, since it uses as much as digits as its factorization.

79945850969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 220449600, while the sum is 71.

The spelling of 79945850969 in words is "seventy-nine billion, nine hundred forty-five million, eight hundred fifty thousand, nine hundred sixty-nine".