57939709 has 4 divisors (see below), whose sum is σ = 59937660. Its totient is φ = 55941760.

The previous prime is 57939677. The next prime is 57939731. The reversal of 57939709 is 90793975.

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 27931225 + 30008484 = 5285^2 + 5478^2 .

It is a cyclic number.

It is not a de Polignac number, because 57939709 - 2⁵ = 57939677 is a prime.

It is a super-3 number, since 3×57939709³ (a number of 24 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57939769) 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, 998932 + ... + 998989.

It is an arithmetic number, because the mean of its divisors is an integer number (14984415).

Almost surely, 2^57939709 is an apocalyptic number.

It is an amenable number.

57939709 is a deficient number, since it is larger than the sum of its proper divisors (1997951).

57939709 is a wasteful number, since it uses less digits than its factorization.

57939709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997950.

The product of its (nonzero) digits is 535815, while the sum is 49.

The square root of 57939709 is about 7611.8137785944. The cubic root of 57939709 is about 386.9534916857.

The spelling of 57939709 in words is "fifty-seven million, nine hundred thirty-nine thousand, seven hundred nine".