79999902979 has 2 divisors, whose sum is σ = 79999902980. Its totient is φ = 79999902978.

The previous prime is 79999902949. The next prime is 79999902989. The reversal of 79999902979 is 97920999997.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79999902979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79999902899 and 79999902908.

It is not a weakly prime, because it can be changed into another prime (79999902929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39999951489 + 39999951490.

It is an arithmetic number, because the mean of its divisors is an integer number (39999951490).

Almost surely, 2^79999902979 is an apocalyptic number.

79999902979 is a deficient number, since it is larger than the sum of its proper divisors (1).

79999902979 is an equidigital number, since it uses as much as digits as its factorization.

79999902979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 468730962, while the sum is 79.

The spelling of 79999902979 in words is "seventy-nine billion, nine hundred ninety-nine million, nine hundred two thousand, nine hundred seventy-nine".