43427891 has 8 divisors (see below), whose sum is σ = 46821264. Its totient is φ = 40042080.

The previous prime is 43427851. The next prime is 43427903. The reversal of 43427891 is 19872434.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43427891 - 2⁶ = 43427827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43427851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17381 + ... + 19721.

It is an arithmetic number, because the mean of its divisors is an integer number (5852658).

Almost surely, 2^43427891 is an apocalyptic number.

43427891 is a deficient number, since it is larger than the sum of its proper divisors (3393373).

43427891 is a wasteful number, since it uses less digits than its factorization.

43427891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781.

The product of its digits is 48384, while the sum is 38.

The square root of 43427891 is about 6589.9841426213. The cubic root of 43427891 is about 351.4980443388.

The spelling of 43427891 in words is "forty-three million, four hundred twenty-seven thousand, eight hundred ninety-one".