43974913 has 4 divisors (see below), whose sum is σ = 44005168. Its totient is φ = 43944660.

The previous prime is 43974877. The next prime is 43974943. The reversal of 43974913 is 31947934.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31947934 = 2 ⋅15973967.

It is a cyclic number.

It is not a de Polignac number, because 43974913 - 2¹⁷ = 43843841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43974943) 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, 12831 + ... + 15892.

It is an arithmetic number, because the mean of its divisors is an integer number (11001292).

Almost surely, 2^43974913 is an apocalyptic number.

It is an amenable number.

43974913 is a deficient number, since it is larger than the sum of its proper divisors (30255).

43974913 is a wasteful number, since it uses less digits than its factorization.

43974913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30254.

The product of its digits is 81648, while the sum is 40.

The square root of 43974913 is about 6631.3583073153. The cubic root of 43974913 is about 352.9677254370.

The spelling of 43974913 in words is "forty-three million, nine hundred seventy-four thousand, nine hundred thirteen".