57088109 has 4 divisors (see below), whose sum is σ = 61479516. Its totient is φ = 52696704.

The previous prime is 57088069. The next prime is 57088111. The reversal of 57088109 is 90188075.

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 29735209 + 27352900 = 5453^2 + 5230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57088109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57088169) 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, 2195684 + ... + 2195709.

It is an arithmetic number, because the mean of its divisors is an integer number (15369879).

Almost surely, 2^57088109 is an apocalyptic number.

It is an amenable number.

57088109 is a deficient number, since it is larger than the sum of its proper divisors (4391407).

57088109 is a wasteful number, since it uses less digits than its factorization.

57088109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4391406.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 57088109 is about 7555.6673431273. The cubic root of 57088109 is about 385.0483078755.

The spelling of 57088109 in words is "fifty-seven million, eighty-eight thousand, one hundred nine".