57391207 has 2 divisors, whose sum is σ = 57391208. Its totient is φ = 57391206.

The previous prime is 57391171. The next prime is 57391211. The reversal of 57391207 is 70219375.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57391207 - 2⁷ = 57391079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57391237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28695603 + 28695604.

It is an arithmetic number, because the mean of its divisors is an integer number (28695604).

Almost surely, 2^57391207 is an apocalyptic number.

57391207 is a deficient number, since it is larger than the sum of its proper divisors (1).

57391207 is an equidigital number, since it uses as much as digits as its factorization.

57391207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 57391207 is about 7575.6984496481. The cubic root of 57391207 is about 385.7285513112.

The spelling of 57391207 in words is "fifty-seven million, three hundred ninety-one thousand, two hundred seven".