57491657 has 2 divisors, whose sum is σ = 57491658. Its totient is φ = 57491656.

The previous prime is 57491641. The next prime is 57491677. The reversal of 57491657 is 75619475.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53743561 + 3748096 = 7331^2 + 1936^2 .

It is a cyclic number.

It is not a de Polignac number, because 57491657 - 2⁴ = 57491641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57491617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28745828 + 28745829.

It is an arithmetic number, because the mean of its divisors is an integer number (28745829).

Almost surely, 2^57491657 is an apocalyptic number.

It is an amenable number.

57491657 is a deficient number, since it is larger than the sum of its proper divisors (1).

57491657 is an equidigital number, since it uses as much as digits as its factorization.

57491657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 44.

The square root of 57491657 is about 7582.3253029661. The cubic root of 57491657 is about 385.9534629391.

The spelling of 57491657 in words is "fifty-seven million, four hundred ninety-one thousand, six hundred fifty-seven".