647639606 has 8 divisors (see below), whose sum is σ = 971577720. Its totient is φ = 323780368.

The previous prime is 647639593. The next prime is 647639627. The reversal of 647639606 is 606936746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9425 + ... + 37203.

It is an arithmetic number, because the mean of its divisors is an integer number (121447215).

Almost surely, 2^647639606 is an apocalyptic number.

647639606 is a deficient number, since it is larger than the sum of its proper divisors (323938114).

647639606 is a wasteful number, since it uses less digits than its factorization.

647639606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39438.

The product of its (nonzero) digits is 979776, while the sum is 47.

The square root of 647639606 is about 25448.7643314955. The cubic root of 647639606 is about 865.1892870974.

The spelling of 647639606 in words is "six hundred forty-seven million, six hundred thirty-nine thousand, six hundred six".