979645 has 4 divisors (see below), whose sum is σ = 1175580. Its totient is φ = 783712.

The previous prime is 979567. The next prime is 979651. The reversal of 979645 is 546979.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546979 = 149 ⋅3671.

It can be written as a sum of positive squares in 2 ways, for example, as 284089 + 695556 = 533^2 + 834^2 .

It is a cyclic number.

It is not a de Polignac number, because 979645 - 2¹⁵ = 946877 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 979598 and 979607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97960 + ... + 97969.

It is an arithmetic number, because the mean of its divisors is an integer number (293895).

2⁹⁷⁹⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

979645 is a deficient number, since it is larger than the sum of its proper divisors (195935).

979645 is a wasteful number, since it uses less digits than its factorization.

979645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195934.

The product of its digits is 68040, while the sum is 40.

The square root of 979645 is about 989.7701753438. The cubic root of 979645 is about 99.3168436010.

It can be divided in two parts, 97964 and 5, that added together give a square (97969 = 313²).

The spelling of 979645 in words is "nine hundred seventy-nine thousand, six hundred forty-five".