93090857 has 2 divisors, whose sum is σ = 93090858. Its totient is φ = 93090856.

The previous prime is 93090839. The next prime is 93090863. The reversal of 93090857 is 75809039.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80209936 + 12880921 = 8956^2 + 3589^2 .

It is an emirp because it is prime and its reverse (75809039) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 93090857 - 2²⁰ = 92042281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (93090817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46545428 + 46545429.

It is an arithmetic number, because the mean of its divisors is an integer number (46545429).

Almost surely, 2^93090857 is an apocalyptic number.

It is an amenable number.

93090857 is a deficient number, since it is larger than the sum of its proper divisors (1).

93090857 is an equidigital number, since it uses as much as digits as its factorization.

93090857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 93090857 is about 9648.3603270193. The cubic root of 93090857 is about 453.2129834193.

The spelling of 93090857 in words is "ninety-three million, ninety thousand, eight hundred fifty-seven".