979631 has 4 divisors (see below), whose sum is σ = 1011264. Its totient is φ = 948000.

The previous prime is 979567. The next prime is 979651. The reversal of 979631 is 136979.

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

It is a cyclic number.

It is not a de Polignac number, because 979631 - 2⁶ = 979567 is a prime.

It is a super-2 number, since 2×979631² = 1919353792322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 979591 and 979600.

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 3 ways as a sum of consecutive naturals, for example, 15770 + ... + 15831.

It is an arithmetic number, because the mean of its divisors is an integer number (252816).

2⁹⁷⁹⁶³¹ is an apocalyptic number.

979631 is a deficient number, since it is larger than the sum of its proper divisors (31633).

979631 is a wasteful number, since it uses less digits than its factorization.

979631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31632.

The product of its digits is 10206, while the sum is 35.

The square root of 979631 is about 989.7631029696. The cubic root of 979631 is about 99.3163704901.

The spelling of 979631 in words is "nine hundred seventy-nine thousand, six hundred thirty-one".