57978793 has 2 divisors, whose sum is σ = 57978794. Its totient is φ = 57978792.

The previous prime is 57978787. The next prime is 57978821. The reversal of 57978793 is 39787975.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30437289 + 27541504 = 5517^2 + 5248^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57978793 is a prime.

It is not a weakly prime, because it can be changed into another prime (57978703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28989396 + 28989397.

It is an arithmetic number, because the mean of its divisors is an integer number (28989397).

Almost surely, 2^57978793 is an apocalyptic number.

It is an amenable number.

57978793 is a deficient number, since it is larger than the sum of its proper divisors (1).

57978793 is an equidigital number, since it uses as much as digits as its factorization.

57978793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3333960, while the sum is 55.

The square root of 57978793 is about 7614.3806708097. The cubic root of 57978793 is about 387.0404803341.

The spelling of 57978793 in words is "fifty-seven million, nine hundred seventy-eight thousand, seven hundred ninety-three".