639577413 has 12 divisors (see below), whose sum is σ = 932469408. Its totient is φ = 422399400.

The previous prime is 639577387. The next prime is 639577423. The reversal of 639577413 is 314775936.

639577413 is a `hidden beast` number, since 6 + 39 + 577 + 41 + 3 = 666.

639577413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 639577413 - 2⁹ = 639576901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639577423) 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, 331113 + ... + 333038.

It is an arithmetic number, because the mean of its divisors is an integer number (77705784).

Almost surely, 2^639577413 is an apocalyptic number.

It is an amenable number.

639577413 is a deficient number, since it is larger than the sum of its proper divisors (292891995).

639577413 is a wasteful number, since it uses less digits than its factorization.

639577413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664264 (or 664261 counting only the distinct ones).

The product of its digits is 476280, while the sum is 45.

The square root of 639577413 is about 25289.8677932487. The cubic root of 639577413 is about 861.5841600647.

The spelling of 639577413 in words is "six hundred thirty-nine million, five hundred seventy-seven thousand, four hundred thirteen".