43791 has 8 divisors (see below), whose sum is σ = 63744. Its totient is φ = 26520.

The previous prime is 43789. The next prime is 43793. The reversal of 43791 is 19734.

It is an interprime number because it is at equal distance from previous prime (43789) and next prime (43793).

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

It is not a de Polignac number, because 43791 - 2¹ = 43789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43793) 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, 631 + ... + 696.

It is an arithmetic number, because the mean of its divisors is an integer number (7968).

2⁴³⁷⁹¹ is an apocalyptic number.

43791 is a deficient number, since it is larger than the sum of its proper divisors (19953).

43791 is a wasteful number, since it uses less digits than its factorization.

43791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341.

The product of its digits is 756, while the sum is 24.

The square root of 43791 is about 209.2629924282. The cubic root of 43791 is about 35.2474974331.

It can be divided in two parts, 437 and 91, that added together give a triangular number (528 = T₃₂).

The spelling of 43791 in words is "forty-three thousand, seven hundred ninety-one".