43979731 has 12 divisors (see below), whose sum is σ = 48235840. Its totient is φ = 40049280.

The previous prime is 43979723. The next prime is 43979753. The reversal of 43979731 is 13797934.

It is not a de Polignac number, because 43979731 - 2³ = 43979723 is a prime.

It is a super-2 number, since 2×43979731² = 3868433477664722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43979701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6505 + ... + 11413.

Almost surely, 2^43979731 is an apocalyptic number.

43979731 is a deficient number, since it is larger than the sum of its proper divisors (4256109).

43979731 is a wasteful number, since it uses less digits than its factorization.

43979731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4974 (or 4957 counting only the distinct ones).

The product of its digits is 142884, while the sum is 43.

The square root of 43979731 is about 6631.7215713569. The cubic root of 43979731 is about 352.9806156379.

The spelling of 43979731 in words is "forty-three million, nine hundred seventy-nine thousand, seven hundred thirty-one".