57497681 has 2 divisors, whose sum is σ = 57497682. Its totient is φ = 57497680.

The previous prime is 57497663. The next prime is 57497707. The reversal of 57497681 is 18679475.

57497681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44422225 + 13075456 = 6665^2 + 3616^2 .

It is a cyclic number.

It is not a de Polignac number, because 57497681 - 2⁶ = 57497617 is a prime.

It is a super-2 number, since 2×57497681² = 6611966640755522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57497641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28748840 + 28748841.

It is an arithmetic number, because the mean of its divisors is an integer number (28748841).

Almost surely, 2^57497681 is an apocalyptic number.

It is an amenable number.

57497681 is a deficient number, since it is larger than the sum of its proper divisors (1).

57497681 is an equidigital number, since it uses as much as digits as its factorization.

57497681 is an odious number, because the sum of its binary digits is odd.

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

The square root of 57497681 is about 7582.7225321780. The cubic root of 57497681 is about 385.9669425904.

The spelling of 57497681 in words is "fifty-seven million, four hundred ninety-seven thousand, six hundred eighty-one".