57397 has 2 divisors, whose sum is σ = 57398. Its totient is φ = 57396.

The previous prime is 57389. The next prime is 57413. The reversal of 57397 is 79375.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34596 + 22801 = 186^2 + 151^2 .

It is a cyclic number.

It is not a de Polignac number, because 57397 - 2³ = 57389 is a prime.

57397 is a lucky number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28698 + 28699.

It is an arithmetic number, because the mean of its divisors is an integer number (28699).

2⁵⁷³⁹⁷ is an apocalyptic number.

It is an amenable number.

57397 is a deficient number, since it is larger than the sum of its proper divisors (1).

57397 is an equidigital number, since it uses as much as digits as its factorization.

57397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6615, while the sum is 31.

The square root of 57397 is about 239.5767100534. The cubic root of 57397 is about 38.5741529201.

It can be divided in two parts, 57 and 397, that added together give a palindrome (454).

The spelling of 57397 in words is "fifty-seven thousand, three hundred ninety-seven".