57783939 has 12 divisors (see below), whose sum is σ = 78537816. Its totient is φ = 37790272.

The previous prime is 57783937. The next prime is 57783961. The reversal of 57783939 is 93938775.

It is a happy number.

It is not a de Polignac number, because 57783939 - 2¹ = 57783937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57783891 and 57783900.

It is not an unprimeable number, because it can be changed into a prime (57783931) 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, 4999 + ... + 11855.

It is an arithmetic number, because the mean of its divisors is an integer number (6544818).

Almost surely, 2^57783939 is an apocalyptic number.

57783939 is a deficient number, since it is larger than the sum of its proper divisors (20753877).

57783939 is an equidigital number, since it uses as much as digits as its factorization.

57783939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6966 (or 6913 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 51.

The square root of 57783939 is about 7601.5747710590. The cubic root of 57783939 is about 386.6064076561.

The spelling of 57783939 in words is "fifty-seven million, seven hundred eighty-three thousand, nine hundred thirty-nine".