747704639 has 16 divisors (see below), whose sum is σ = 824605056. Its totient is φ = 672328800.

The previous prime is 747704627. The next prime is 747704641. The reversal of 747704639 is 936407747.

It is not a de Polignac number, because 747704639 - 2⁸ = 747704383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 747704593 and 747704602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747704609) 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, 571424 + ... + 572730.

It is an arithmetic number, because the mean of its divisors is an integer number (51537816).

Almost surely, 2^747704639 is an apocalyptic number.

747704639 is a deficient number, since it is larger than the sum of its proper divisors (76900417).

747704639 is a wasteful number, since it uses less digits than its factorization.

747704639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1846.

The product of its (nonzero) digits is 889056, while the sum is 47.

The square root of 747704639 is about 27344.1883953428. The cubic root of 747704639 is about 907.6324719657.

The spelling of 747704639 in words is "seven hundred forty-seven million, seven hundred four thousand, six hundred thirty-nine".