79965157939 has 2 divisors, whose sum is σ = 79965157940. Its totient is φ = 79965157938.

The previous prime is 79965157919. The next prime is 79965157949. The reversal of 79965157939 is 93975156997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79965157939 - 2⁵ = 79965157907 is a prime.

It is not a weakly prime, because it can be changed into another prime (79965157919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39982578969 + 39982578970.

It is an arithmetic number, because the mean of its divisors is an integer number (39982578970).

Almost surely, 2^79965157939 is an apocalyptic number.

79965157939 is a deficient number, since it is larger than the sum of its proper divisors (1).

79965157939 is an equidigital number, since it uses as much as digits as its factorization.

79965157939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144670050, while the sum is 70.

The spelling of 79965157939 in words is "seventy-nine billion, nine hundred sixty-five million, one hundred fifty-seven thousand, nine hundred thirty-nine".