93938813 has 2 divisors, whose sum is σ = 93938814. Its totient is φ = 93938812.

The previous prime is 93938783. The next prime is 93938837. The reversal of 93938813 is 31883939.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82500889 + 11437924 = 9083^2 + 3382^2 .

It is a cyclic number.

It is not a de Polignac number, because 93938813 - 2⁸ = 93938557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93938113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46969406 + 46969407.

It is an arithmetic number, because the mean of its divisors is an integer number (46969407).

Almost surely, 2^93938813 is an apocalyptic number.

It is an amenable number.

93938813 is a deficient number, since it is larger than the sum of its proper divisors (1).

93938813 is an equidigital number, since it uses as much as digits as its factorization.

93938813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 44.

The square root of 93938813 is about 9692.2037225803. The cubic root of 93938813 is about 454.5849179107.

The spelling of 93938813 in words is "ninety-three million, nine hundred thirty-eight thousand, eight hundred thirteen".