99970979 has 2 divisors, whose sum is σ = 99970980. Its totient is φ = 99970978.

The previous prime is 99970961. The next prime is 99970993. The reversal of 99970979 is 97907999.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99970979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99970919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49985489 + 49985490.

It is an arithmetic number, because the mean of its divisors is an integer number (49985490).

Almost surely, 2^99970979 is an apocalyptic number.

99970979 is a deficient number, since it is larger than the sum of its proper divisors (1).

99970979 is an equidigital number, since it uses as much as digits as its factorization.

99970979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2893401, while the sum is 59.

The square root of 99970979 is about 9998.5488447074. The cubic root of 99970979 is about 464.1139778338.

The spelling of 99970979 in words is "ninety-nine million, nine hundred seventy thousand, nine hundred seventy-nine".