979998 has 16 divisors (see below), whose sum is σ = 1971216. Its totient is φ = 324800.

The previous prime is 979987. The next prime is 980027. The reversal of 979998 is 899979.

It is a self number, because there is not a number n which added to its sum of digits gives 979998.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 979998.

It is an unprimeable number.

979998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1048 + ... + 1748.

It is an arithmetic number, because the mean of its divisors is an integer number (123201).

2⁹⁷⁹⁹⁹⁸ is an apocalyptic number.

979998 is an abundant number, since it is smaller than the sum of its proper divisors (991218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

979998 is a wasteful number, since it uses less digits than its factorization.

979998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939.

The product of its digits is 367416, while the sum is 51.

The square root of 979998 is about 989.9484835081. The cubic root of 979998 is about 99.3287712672.

The spelling of 979998 in words is "nine hundred seventy-nine thousand, nine hundred ninety-eight".