57791087 has 2 divisors, whose sum is σ = 57791088. Its totient is φ = 57791086.

The previous prime is 57791053. The next prime is 57791093. The reversal of 57791087 is 78019775.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57791087 - 2⁶ = 57791023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57791047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28895543 + 28895544.

It is an arithmetic number, because the mean of its divisors is an integer number (28895544).

Almost surely, 2^57791087 is an apocalyptic number.

57791087 is a deficient number, since it is larger than the sum of its proper divisors (1).

57791087 is an equidigital number, since it uses as much as digits as its factorization.

57791087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 44.

The square root of 57791087 is about 7602.0449222561. The cubic root of 57791087 is about 386.6223483524.

The spelling of 57791087 in words is "fifty-seven million, seven hundred ninety-one thousand, eighty-seven".