57400457 has 2 divisors, whose sum is σ = 57400458. Its totient is φ = 57400456.

The previous prime is 57400363. The next prime is 57400477. The reversal of 57400457 is 75400475.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54228496 + 3171961 = 7364^2 + 1781^2 .

It is a cyclic number.

It is not a de Polignac number, because 57400457 - 2¹⁴ = 57384073 is a prime.

It is a Chen prime.

It is equal to p_3416945 and since 57400457 and 3416945 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (57400477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28700228 + 28700229.

It is an arithmetic number, because the mean of its divisors is an integer number (28700229).

Almost surely, 2^57400457 is an apocalyptic number.

It is an amenable number.

57400457 is a deficient number, since it is larger than the sum of its proper divisors (1).

57400457 is an equidigital number, since it uses as much as digits as its factorization.

57400457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19600, while the sum is 32.

The square root of 57400457 is about 7576.3089298154. The cubic root of 57400457 is about 385.7492734021.

The spelling of 57400457 in words is "fifty-seven million, four hundred thousand, four hundred fifty-seven".