647579479207 has 4 divisors (see below), whose sum is σ = 647865136296. Its totient is φ = 647293822120.

The previous prime is 647579479181. The next prime is 647579479223. The reversal of 647579479207 is 702974975746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 647579479207 - 2²⁷ = 647445261479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647579479247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142825144 + ... + 142829677.

It is an arithmetic number, because the mean of its divisors is an integer number (161966284074).

Almost surely, 2^647579479207 is an apocalyptic number.

647579479207 is a deficient number, since it is larger than the sum of its proper divisors (285657089).

647579479207 is a wasteful number, since it uses less digits than its factorization.

647579479207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285657088.

The product of its (nonzero) digits is 186701760, while the sum is 67.

The spelling of 647579479207 in words is "six hundred forty-seven billion, five hundred seventy-nine million, four hundred seventy-nine thousand, two hundred seven".