57137873 has 4 divisors (see below), whose sum is σ = 61533108. Its totient is φ = 52742640.

The previous prime is 57137849. The next prime is 57137897. The reversal of 57137873 is 37873175.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (57137849) and next prime (57137897).

It can be written as a sum of positive squares in 2 ways, for example, as 27793984 + 29343889 = 5272^2 + 5417^2 .

It is a cyclic number.

It is not a de Polignac number, because 57137873 - 2¹² = 57133777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57137873.

It is not an unprimeable number, because it can be changed into a prime (57137803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2197598 + ... + 2197623.

It is an arithmetic number, because the mean of its divisors is an integer number (15383277).

Almost surely, 2^57137873 is an apocalyptic number.

It is an amenable number.

57137873 is a deficient number, since it is larger than the sum of its proper divisors (4395235).

57137873 is a wasteful number, since it uses less digits than its factorization.

57137873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395234.

The product of its digits is 123480, while the sum is 41.

The square root of 57137873 is about 7558.9597829331. The cubic root of 57137873 is about 385.1601582490.

The spelling of 57137873 in words is "fifty-seven million, one hundred thirty-seven thousand, eight hundred seventy-three".