639593113 has 4 divisors (see below), whose sum is σ = 650078308. Its totient is φ = 629107920.

The previous prime is 639593093. The next prime is 639593161. The reversal of 639593113 is 311395936.

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 6718464 + 632874649 = 2592^2 + 25157^2 .

It is a cyclic number.

It is not a de Polignac number, because 639593113 - 2¹³ = 639584921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639593183) 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, 5242506 + ... + 5242627.

It is an arithmetic number, because the mean of its divisors is an integer number (162519577).

Almost surely, 2^639593113 is an apocalyptic number.

It is an amenable number.

639593113 is a deficient number, since it is larger than the sum of its proper divisors (10485195).

639593113 is a wasteful number, since it uses less digits than its factorization.

639593113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10485194.

The product of its digits is 65610, while the sum is 40.

The square root of 639593113 is about 25290.1781923339. The cubic root of 639593113 is about 861.5912099075.

The spelling of 639593113 in words is "six hundred thirty-nine million, five hundred ninety-three thousand, one hundred thirteen".