647579403 has 6 divisors (see below), whose sum is σ = 935392484. Its totient is φ = 431719596.

The previous prime is 647579399. The next prime is 647579417. The reversal of 647579403 is 304975746.

It is not a de Polignac number, because 647579403 - 2² = 647579399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (647579473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35976625 + ... + 35976642.

Almost surely, 2^647579403 is an apocalyptic number.

647579403 is a deficient number, since it is larger than the sum of its proper divisors (287813081).

647579403 is a wasteful number, since it uses less digits than its factorization.

647579403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71953273 (or 71953270 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The square root of 647579403 is about 25447.5814764390. The cubic root of 647579403 is about 865.1624776372.

The spelling of 647579403 in words is "six hundred forty-seven million, five hundred seventy-nine thousand, four hundred three".