57813309 has 12 divisors (see below), whose sum is σ = 84336252. Its totient is φ = 38160000.

The previous prime is 57813307. The next prime is 57813317. The reversal of 57813309 is 90331875.

It can be written as a sum of positive squares in 2 ways, for example, as 54022500 + 3790809 = 7350^2 + 1947^2 .

It is not a de Polignac number, because 57813309 - 2¹ = 57813307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57813307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30892 + ... + 32709.

It is an arithmetic number, because the mean of its divisors is an integer number (7028021).

Almost surely, 2^57813309 is an apocalyptic number.

It is an amenable number.

57813309 is a deficient number, since it is larger than the sum of its proper divisors (26522943).

57813309 is a wasteful number, since it uses less digits than its factorization.

57813309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63708 (or 63705 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 57813309 is about 7603.5063621990. The cubic root of 57813309 is about 386.6718970590.

The spelling of 57813309 in words is "fifty-seven million, eight hundred thirteen thousand, three hundred nine".