979664 has 20 divisors (see below), whose sum is σ = 2169504. Its totient is φ = 419808.

The previous prime is 979651. The next prime is 979691. The reversal of 979664 is 466979.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

979664 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 4262 + ... + 4485.

2⁹⁷⁹⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

979664 is an abundant number, since it is smaller than the sum of its proper divisors (1189840).

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

979664 is a wasteful number, since it uses less digits than its factorization.

979664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8762 (or 8756 counting only the distinct ones).

The product of its digits is 81648, while the sum is 41.

The square root of 979664 is about 989.7797734850. The cubic root of 979664 is about 99.3174856730.

It can be divided in two parts, 979 and 664, that multiplied together give a palindrome (650056).

The spelling of 979664 in words is "nine hundred seventy-nine thousand, six hundred sixty-four".