57170387 has 4 divisors (see below), whose sum is σ = 59656080. Its totient is φ = 54684696.

The previous prime is 57170383. The next prime is 57170401. The reversal of 57170387 is 78307175.

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

It is a cyclic number.

It is not a de Polignac number, because 57170387 - 2² = 57170383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57170387.

It is not an unprimeable number, because it can be changed into a prime (57170381) 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, 1242812 + ... + 1242857.

It is an arithmetic number, because the mean of its divisors is an integer number (14914020).

Almost surely, 2^57170387 is an apocalyptic number.

57170387 is a deficient number, since it is larger than the sum of its proper divisors (2485693).

57170387 is a wasteful number, since it uses less digits than its factorization.

57170387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485692.

The product of its (nonzero) digits is 41160, while the sum is 38.

The square root of 57170387 is about 7561.1101698097. The cubic root of 57170387 is about 385.2332021694.

The spelling of 57170387 in words is "fifty-seven million, one hundred seventy thousand, three hundred eighty-seven".