99928957 has 2 divisors, whose sum is σ = 99928958. Its totient is φ = 99928956.

The previous prime is 99928937. The next prime is 99928973. The reversal of 99928957 is 75982999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93431556 + 6497401 = 9666^2 + 2549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99928957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99928937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49964478 + 49964479.

It is an arithmetic number, because the mean of its divisors is an integer number (49964479).

Almost surely, 2^99928957 is an apocalyptic number.

It is an amenable number.

99928957 is a deficient number, since it is larger than the sum of its proper divisors (1).

99928957 is an equidigital number, since it uses as much as digits as its factorization.

99928957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 58.

The square root of 99928957 is about 9996.4472188873. The cubic root of 99928957 is about 464.0489398563.

The spelling of 99928957 in words is "ninety-nine million, nine hundred twenty-eight thousand, nine hundred fifty-seven".