43879 has 4 divisors (see below), whose sum is σ = 47880. Its totient is φ = 39880.

The previous prime is 43867. The next prime is 43889. The reversal of 43879 is 97834.

43879 = 83² + 84² + ... + 88².

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43879 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

43879 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 43879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43889) 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, 1984 + ... + 2005.

It is an arithmetic number, because the mean of its divisors is an integer number (11970).

2⁴³⁸⁷⁹ is an apocalyptic number.

43879 is a deficient number, since it is larger than the sum of its proper divisors (4001).

43879 is a wasteful number, since it uses less digits than its factorization.

43879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000.

The product of its digits is 6048, while the sum is 31.

The square root of 43879 is about 209.4731486372. The cubic root of 43879 is about 35.2710921167.

It can be divided in two parts, 4 and 3879, that added together give a palindrome (3883).

The spelling of 43879 in words is "forty-three thousand, eight hundred seventy-nine".