57957491 has 2 divisors, whose sum is σ = 57957492. Its totient is φ = 57957490.

The previous prime is 57957469. The next prime is 57957509. The reversal of 57957491 is 19475975.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57957491 is a prime.

It is not a weakly prime, because it can be changed into another prime (57957091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28978745 + 28978746.

It is an arithmetic number, because the mean of its divisors is an integer number (28978746).

Almost surely, 2^57957491 is an apocalyptic number.

57957491 is a deficient number, since it is larger than the sum of its proper divisors (1).

57957491 is an equidigital number, since it uses as much as digits as its factorization.

57957491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 396900, while the sum is 47.

The square root of 57957491 is about 7612.9817417356. The cubic root of 57957491 is about 386.9930736541.

The spelling of 57957491 in words is "fifty-seven million, nine hundred fifty-seven thousand, four hundred ninety-one".