647126986 has 16 divisors (see below), whose sum is σ = 1076885280. Its totient is φ = 289162480.

The previous prime is 647126951. The next prime is 647126993. The reversal of 647126986 is 689621746.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247981 + ... + 250576.

It is an arithmetic number, because the mean of its divisors is an integer number (67305330).

Almost surely, 2^647126986 is an apocalyptic number.

647126986 is a deficient number, since it is larger than the sum of its proper divisors (429758294).

647126986 is a wasteful number, since it uses less digits than its factorization.

647126986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498629.

The product of its digits is 870912, while the sum is 49.

The square root of 647126986 is about 25438.6907288878. The cubic root of 647126986 is about 864.9609551690.

The spelling of 647126986 in words is "six hundred forty-seven million, one hundred twenty-six thousand, nine hundred eighty-six".