99457979 has 2 divisors, whose sum is σ = 99457980. Its totient is φ = 99457978.

The previous prime is 99457937. The next prime is 99457993. The reversal of 99457979 is 97975499.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99457979 - 2²⁰ = 98409403 is a prime.

It is not a weakly prime, because it can be changed into another prime (99457909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49728989 + 49728990.

It is an arithmetic number, because the mean of its divisors is an integer number (49728990).

Almost surely, 2^99457979 is an apocalyptic number.

99457979 is a deficient number, since it is larger than the sum of its proper divisors (1).

99457979 is an equidigital number, since it uses as much as digits as its factorization.

99457979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6429780, while the sum is 59.

The square root of 99457979 is about 9972.8621267919. The cubic root of 99457979 is about 463.3187507559.

The spelling of 99457979 in words is "ninety-nine million, four hundred fifty-seven thousand, nine hundred seventy-nine".