979855 has 4 divisors (see below), whose sum is σ = 1175832. Its totient is φ = 783880.

The previous prime is 979831. The next prime is 979873. The reversal of 979855 is 558979.

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

It is not a de Polignac number, because 979855 - 2⁹ = 979343 is a prime.

It is a Duffinian number.

979855 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97981 + ... + 97990.

It is an arithmetic number, because the mean of its divisors is an integer number (293958).

2⁹⁷⁹⁸⁵⁵ is an apocalyptic number.

979855 is a deficient number, since it is larger than the sum of its proper divisors (195977).

979855 is a wasteful number, since it uses less digits than its factorization.

979855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195976.

The product of its digits is 113400, while the sum is 43.

The square root of 979855 is about 989.8762548925. The cubic root of 979855 is about 99.3239397250.

The spelling of 979855 in words is "nine hundred seventy-nine thousand, eight hundred fifty-five".