99904457 has 2 divisors, whose sum is σ = 99904458.
Its totient is φ = 99904456.
The previous prime is 99904439. The next prime is 99904463. The reversal of 99904457 is 75440999.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 75411856 + 24492601 = 8684^2 + 4949^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-99904457 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (99904487) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49952228 + 49952229.
It is an arithmetic number, because the mean of its divisors is an integer number (49952229).
Almost surely, 299904457 is an apocalyptic number.
It is an amenable number.
99904457 is a deficient number, since it is larger than the sum of its proper divisors (1).
99904457 is an equidigital number, since it uses as much as digits as its factorization.
99904457 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 408240, while the sum is 47.
The square root of 99904457 is about 9995.2217083965.
The cubic root of 99904457 is about 464.0110124839.
The spelling of 99904457 in words is "ninety-nine million, nine hundred four thousand, four hundred fifty-seven".