57509369 has 4 divisors (see below), whose sum is σ = 57526260. Its totient is φ = 57492480.

The previous prime is 57509321. The next prime is 57509377. The reversal of 57509369 is 96390575.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 51652969 = 2420^2 + 7187^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57509369 is a prime.

It is a super-2 number, since 2×57509369² = 6614655045556322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57505369) 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, 1352 + ... + 10809.

It is an arithmetic number, because the mean of its divisors is an integer number (14381565).

Almost surely, 2^57509369 is an apocalyptic number.

It is an amenable number.

57509369 is a deficient number, since it is larger than the sum of its proper divisors (16891).

57509369 is a wasteful number, since it uses less digits than its factorization.

57509369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16890.

The product of its (nonzero) digits is 255150, while the sum is 44.

The square root of 57509369 is about 7583.4931924543. The cubic root of 57509369 is about 385.9930936508.

The spelling of 57509369 in words is "fifty-seven million, five hundred nine thousand, three hundred sixty-nine".