99931057 has 2 divisors, whose sum is σ = 99931058. Its totient is φ = 99931056.

The previous prime is 99931037. The next prime is 99931061. The reversal of 99931057 is 75013999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71639296 + 28291761 = 8464^2 + 5319^2 .

It is a cyclic number.

It is not a de Polignac number, because 99931057 - 2²³ = 91542449 is a prime.

It is not a weakly prime, because it can be changed into another prime (99931037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49965528 + 49965529.

It is an arithmetic number, because the mean of its divisors is an integer number (49965529).

Almost surely, 2^99931057 is an apocalyptic number.

It is an amenable number.

99931057 is a deficient number, since it is larger than the sum of its proper divisors (1).

99931057 is an equidigital number, since it uses as much as digits as its factorization.

99931057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 99931057 is about 9996.5522556529. The cubic root of 99931057 is about 464.0521904854.

The spelling of 99931057 in words is "ninety-nine million, nine hundred thirty-one thousand, fifty-seven".