979621 has 8 divisors (see below), whose sum is σ = 1054080. Its totient is φ = 907488.

The previous prime is 979567. The next prime is 979651. The reversal of 979621 is 126979.

979621 = 218² + 219² + ... + 236².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 979621 - 2⁹ = 979109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345 + ... + 1441.

It is an arithmetic number, because the mean of its divisors is an integer number (131760).

2⁹⁷⁹⁶²¹ is an apocalyptic number.

It is an amenable number.

979621 is a deficient number, since it is larger than the sum of its proper divisors (74459).

979621 is a wasteful number, since it uses less digits than its factorization.

979621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163.

The product of its digits is 6804, while the sum is 34.

The square root of 979621 is about 989.7580512428. The cubic root of 979621 is about 99.3160325509.

It can be divided in two parts, 979 and 621, that added together give a square (1600 = 40²).

The spelling of 979621 in words is "nine hundred seventy-nine thousand, six hundred twenty-one".