365979 has 4 divisors (see below), whose sum is σ = 487976. Its totient is φ = 243984.

The previous prime is 365969. The next prime is 365983. The reversal of 365979 is 979563.

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

It is not a de Polignac number, because 365979 - 2⁷ = 365851 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 365979.

It is not an unprimeable number, because it can be changed into a prime (365929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60994 + ... + 60999.

It is an arithmetic number, because the mean of its divisors is an integer number (121994).

2³⁶⁵⁹⁷⁹ is an apocalyptic number.

365979 is a deficient number, since it is larger than the sum of its proper divisors (121997).

365979 is a wasteful number, since it uses less digits than its factorization.

365979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121996.

The product of its digits is 51030, while the sum is 39.

The square root of 365979 is about 604.9619822766. The cubic root of 365979 is about 71.5295328469.

Subtracting from 365979 its sum of digits (39), we obtain a triangular number (365940 = T₈₅₅).

The spelling of 365979 in words is "three hundred sixty-five thousand, nine hundred seventy-nine".