57491867 has 2 divisors, whose sum is σ = 57491868. Its totient is φ = 57491866.

The previous prime is 57491827. The next prime is 57491897. The reversal of 57491867 is 76819475.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57491867 - 2²⁰ = 56443291 is a prime.

It is a super-2 number, since 2×57491867² = 6610629542291378, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57491827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28745933 + 28745934.

It is an arithmetic number, because the mean of its divisors is an integer number (28745934).

Almost surely, 2^57491867 is an apocalyptic number.

57491867 is a deficient number, since it is larger than the sum of its proper divisors (1).

57491867 is an equidigital number, since it uses as much as digits as its factorization.

57491867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 47.

The square root of 57491867 is about 7582.3391509481. The cubic root of 57491867 is about 385.9539328631.

The spelling of 57491867 in words is "fifty-seven million, four hundred ninety-one thousand, eight hundred sixty-seven".