745929731 has 4 divisors (see below), whose sum is σ = 766090032. Its totient is φ = 725769432.

The previous prime is 745929727. The next prime is 745929749. The reversal of 745929731 is 137929547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 137929547 = 7 ⋅19704221.

It is a cyclic number.

It is not a de Polignac number, because 745929731 - 2² = 745929727 is a prime.

It is a super-2 number, since 2×745929731² = 1112822327179464722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (745929761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10080095 + ... + 10080168.

It is an arithmetic number, because the mean of its divisors is an integer number (191522508).

Almost surely, 2^745929731 is an apocalyptic number.

745929731 is a deficient number, since it is larger than the sum of its proper divisors (20160301).

745929731 is a wasteful number, since it uses less digits than its factorization.

745929731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20160300.

The product of its digits is 476280, while the sum is 47.

The square root of 745929731 is about 27311.7141717615. The cubic root of 745929731 is about 906.9137208965.

The spelling of 745929731 in words is "seven hundred forty-five million, nine hundred twenty-nine thousand, seven hundred thirty-one".