639930483 has 16 divisors (see below), whose sum is σ = 961035040. Its totient is φ = 420774912.

The previous prime is 639930481. The next prime is 639930497. The reversal of 639930483 is 384039936.

639930483 is a `hidden beast` number, since 639 + 9 + 3 + 0 + 4 + 8 + 3 = 666.

It is not a de Polignac number, because 639930483 - 2¹ = 639930481 is a prime.

It is a super-2 number, since 2×639930483² = 819022046145226578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639930481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160366 + ... + 164307.

It is an arithmetic number, because the mean of its divisors is an integer number (60064690).

Almost surely, 2^639930483 is an apocalyptic number.

639930483 is a deficient number, since it is larger than the sum of its proper divisors (321104557).

639930483 is a wasteful number, since it uses less digits than its factorization.

639930483 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324755 (or 324749 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 639930483 is about 25296.8472936846. The cubic root of 639930483 is about 861.7426728337.

The spelling of 639930483 in words is "six hundred thirty-nine million, nine hundred thirty thousand, four hundred eighty-three".