647672051 has 12 divisors (see below), whose sum is σ = 725514480. Its totient is φ = 577231200.

The previous prime is 647672041. The next prime is 647672059. The reversal of 647672051 is 150276746.

It is not a de Polignac number, because 647672051 - 2²⁶ = 580563187 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 647671996 and 647672014.

It is not an unprimeable number, because it can be changed into a prime (647672059) 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, 61175 + ... + 70976.

It is an arithmetic number, because the mean of its divisors is an integer number (60459540).

Almost surely, 2^647672051 is an apocalyptic number.

647672051 is a deficient number, since it is larger than the sum of its proper divisors (77842429).

647672051 is a wasteful number, since it uses less digits than its factorization.

647672051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132206 (or 132193 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 647672051 is about 25449.4017807885. The cubic root of 647672051 is about 865.2037347405.

The spelling of 647672051 in words is "six hundred forty-seven million, six hundred seventy-two thousand, fifty-one".