747505731 has 40 divisors (see below), whose sum is σ = 1171893584. Its totient is φ = 423783360.

The previous prime is 747505723. The next prime is 747505739. The reversal of 747505731 is 137505747.

It is an interprime number because it is at equal distance from previous prime (747505723) and next prime (747505739).

It is not a de Polignac number, because 747505731 - 2³ = 747505723 is a prime.

It is a super-2 number, since 2×747505731² = 1117529635755688722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 747505731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (747505739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1130541 + ... + 1131201.

Almost surely, 2^747505731 is an apocalyptic number.

747505731 is a deficient number, since it is larger than the sum of its proper divisors (424387853).

747505731 is an equidigital number, since it uses as much as digits as its factorization.

747505731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 102900, while the sum is 39.

The square root of 747505731 is about 27340.5510368756. The cubic root of 747505731 is about 907.5519805695.

The spelling of 747505731 in words is "seven hundred forty-seven million, five hundred five thousand, seven hundred thirty-one".