979986 has 16 divisors (see below), whose sum is σ = 2240064. Its totient is φ = 279984.

The previous prime is 979969. The next prime is 979987. The reversal of 979986 is 689979.

It is a happy number.

979986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 979986.

It is not an unprimeable number, because it can be changed into a prime (979987) by changing a digit.

979986 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, 11625 + ... + 11708.

It is an arithmetic number, because the mean of its divisors is an integer number (140004).

2⁹⁷⁹⁹⁸⁶ is an apocalyptic number.

979986 is an abundant number, since it is smaller than the sum of its proper divisors (1260078).

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

979986 is a wasteful number, since it uses less digits than its factorization.

979986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23345.

The product of its digits is 244944, while the sum is 48.

The square root of 979986 is about 989.9424225681. The cubic root of 979986 is about 99.3283658412.

The spelling of 979986 in words is "nine hundred seventy-nine thousand, nine hundred eighty-six".