639383275 has 12 divisors (see below), whose sum is σ = 803698312. Its totient is φ = 504498240.

The previous prime is 639383263. The next prime is 639383281. The reversal of 639383275 is 572383936.

It is not a de Polignac number, because 639383275 - 2¹¹ = 639381227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173349 + ... + 176998.

Almost surely, 2^639383275 is an apocalyptic number.

639383275 is a deficient number, since it is larger than the sum of its proper divisors (164315037).

639383275 is a wasteful number, since it uses less digits than its factorization.

639383275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350430 (or 350425 counting only the distinct ones).

The product of its digits is 816480, while the sum is 46.

The square root of 639383275 is about 25286.0292454153. The cubic root of 639383275 is about 861.4969758557.

The spelling of 639383275 in words is "six hundred thirty-nine million, three hundred eighty-three thousand, two hundred seventy-five".