647676403 has 16 divisors (see below), whose sum is σ = 723064320. Its totient is φ = 575092000.

The previous prime is 647676383. The next prime is 647676409. The reversal of 647676403 is 304676746.

It is not a de Polignac number, because 647676403 - 2⁵ = 647676371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 647676403.

It is not an unprimeable number, because it can be changed into a prime (647676409) 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, 339753 + ... + 341653.

It is an arithmetic number, because the mean of its divisors is an integer number (45191520).

Almost surely, 2^647676403 is an apocalyptic number.

647676403 is a deficient number, since it is larger than the sum of its proper divisors (75387917).

647676403 is a wasteful number, since it uses less digits than its factorization.

647676403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618.

The product of its (nonzero) digits is 508032, while the sum is 43.

The square root of 647676403 is about 25449.4872836370. The cubic root of 647676403 is about 865.2056726339.

The spelling of 647676403 in words is "six hundred forty-seven million, six hundred seventy-six thousand, four hundred three".