57961591 has 2 divisors, whose sum is σ = 57961592. Its totient is φ = 57961590.

The previous prime is 57961531. The next prime is 57961601. The reversal of 57961591 is 19516975.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57961591 - 2¹¹ = 57959543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57961531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28980795 + 28980796.

It is an arithmetic number, because the mean of its divisors is an integer number (28980796).

Almost surely, 2^57961591 is an apocalyptic number.

57961591 is a deficient number, since it is larger than the sum of its proper divisors (1).

57961591 is an equidigital number, since it uses as much as digits as its factorization.

57961591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85050, while the sum is 43.

The square root of 57961591 is about 7613.2510138574. The cubic root of 57961591 is about 387.0021989294.

The spelling of 57961591 in words is "fifty-seven million, nine hundred sixty-one thousand, five hundred ninety-one".