57397439 has 6 divisors (see below), whose sum is σ = 63089880. Its totient is φ = 52179380.

The previous prime is 57397433. The next prime is 57397469. The reversal of 57397439 is 93479375.

It is a happy number.

It is not a de Polignac number, because 57397439 - 2⁸ = 57397183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57397393 and 57397402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57397433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 237059 + ... + 237300.

It is an arithmetic number, because the mean of its divisors is an integer number (10514980).

Almost surely, 2^57397439 is an apocalyptic number.

57397439 is a deficient number, since it is larger than the sum of its proper divisors (5692441).

57397439 is a wasteful number, since it uses less digits than its factorization.

57397439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474381 (or 474370 counting only the distinct ones).

The product of its digits is 714420, while the sum is 47.

The square root of 57397439 is about 7576.1097536929. The cubic root of 57397439 is about 385.7425126446.

The spelling of 57397439 in words is "fifty-seven million, three hundred ninety-seven thousand, four hundred thirty-nine".