53979 has 8 divisors (see below), whose sum is σ = 75840. Its totient is φ = 34056.

The previous prime is 53959. The next prime is 53987. The reversal of 53979 is 97935.

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

It is not a de Polignac number, because 53979 - 2¹⁵ = 21211 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (53939) 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, 417 + ... + 530.

It is an arithmetic number, because the mean of its divisors is an integer number (9480).

2⁵³⁹⁷⁹ is an apocalyptic number.

53979 is a deficient number, since it is larger than the sum of its proper divisors (21861).

53979 is a wasteful number, since it uses less digits than its factorization.

53979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969.

The product of its digits is 8505, while the sum is 33.

The square root of 53979 is about 232.3338115729. Note that the first 3 decimals coincide. The cubic root of 53979 is about 37.7927311686.

Subtracting 53979 from its reverse (97935), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 53979 in words is "fifty-three thousand, nine hundred seventy-nine".