57408731 has 2 divisors, whose sum is σ = 57408732. Its totient is φ = 57408730.

The previous prime is 57408727. The next prime is 57408739. The reversal of 57408731 is 13780475.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57408731 - 2² = 57408727 is a prime.

It is a super-2 number, since 2×57408731² = 6591524790060722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 57408691 and 57408700.

It is not a weakly prime, because it can be changed into another prime (57408739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28704365 + 28704366.

It is an arithmetic number, because the mean of its divisors is an integer number (28704366).

Almost surely, 2^57408731 is an apocalyptic number.

57408731 is a deficient number, since it is larger than the sum of its proper divisors (1).

57408731 is an equidigital number, since it uses as much as digits as its factorization.

57408731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 57408731 is about 7576.8549543990. The cubic root of 57408731 is about 385.7678071462.

The spelling of 57408731 in words is "fifty-seven million, four hundred eight thousand, seven hundred thirty-one".