43974891 has 12 divisors (see below), whose sum is σ = 63593400. Its totient is φ = 29282400.

The previous prime is 43974877. The next prime is 43974943. The reversal of 43974891 is 19847934.

43974891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43974891 - 2⁵ = 43974859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43974841) 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 11 ways as a sum of consecutive naturals, for example, 7135 + ... + 11783.

It is an arithmetic number, because the mean of its divisors is an integer number (5299450).

Almost surely, 2^43974891 is an apocalyptic number.

43974891 is a deficient number, since it is larger than the sum of its proper divisors (19618509).

43974891 is a wasteful number, since it uses less digits than its factorization.

43974891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5706 (or 5703 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 43974891 is about 6631.3566485298. The cubic root of 43974891 is about 352.9676665755.

The spelling of 43974891 in words is "forty-three million, nine hundred seventy-four thousand, eight hundred ninety-one".