747981689 has 32 divisors (see below), whose sum is σ = 983076864. Its totient is φ = 552847680.

The previous prime is 747981679. The next prime is 747981701. The reversal of 747981689 is 986189747.

It is not a de Polignac number, because 747981689 - 2⁴ = 747981673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (747981629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85844 + ... + 94154.

It is an arithmetic number, because the mean of its divisors is an integer number (30721152).

Almost surely, 2^747981689 is an apocalyptic number.

It is an amenable number.

747981689 is a deficient number, since it is larger than the sum of its proper divisors (235095175).

747981689 is a wasteful number, since it uses less digits than its factorization.

747981689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8397.

The product of its digits is 6096384, while the sum is 59.

The square root of 747981689 is about 27349.2539020720. The cubic root of 747981689 is about 907.7445610232.

The spelling of 747981689 in words is "seven hundred forty-seven million, nine hundred eighty-one thousand, six hundred eighty-nine".