43979939 has 16 divisors (see below), whose sum is σ = 46543008. Its totient is φ = 41513472.

The previous prime is 43979911. The next prime is 43979953. The reversal of 43979939 is 93997934.

43979939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 43979939 - 2²⁴ = 27202723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43979909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280049 + ... + 280205.

It is an arithmetic number, because the mean of its divisors is an integer number (2908938).

Almost surely, 2^43979939 is an apocalyptic number.

43979939 is a deficient number, since it is larger than the sum of its proper divisors (2563069).

43979939 is a wasteful number, since it uses less digits than its factorization.

43979939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374.

The product of its digits is 1653372, while the sum is 53.

The square root of 43979939 is about 6631.7372535407. The cubic root of 43979939 is about 352.9811721053.

The spelling of 43979939 in words is "forty-three million, nine hundred seventy-nine thousand, nine hundred thirty-nine".