99193931 has 2 divisors, whose sum is σ = 99193932. Its totient is φ = 99193930.

The previous prime is 99193909. The next prime is 99193957. The reversal of 99193931 is 13939199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99193931 - 2⁶ = 99193867 is a prime.

It is a super-2 number, since 2×99193931² = 19678871894465522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99193961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49596965 + 49596966.

It is an arithmetic number, because the mean of its divisors is an integer number (49596966).

Almost surely, 2^99193931 is an apocalyptic number.

99193931 is a deficient number, since it is larger than the sum of its proper divisors (1).

99193931 is an equidigital number, since it uses as much as digits as its factorization.

99193931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 59049, while the sum is 44.

The square root of 99193931 is about 9959.6150025992. The cubic root of 99193931 is about 462.9083703625.

The spelling of 99193931 in words is "ninety-nine million, one hundred ninety-three thousand, nine hundred thirty-one".