979565 has 4 divisors (see below), whose sum is σ = 1175484. Its totient is φ = 783648.

The previous prime is 979553. The next prime is 979567. The reversal of 979565 is 565979.

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

It can be written as a sum of positive squares in 2 ways, for example, as 316969 + 662596 = 563^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 979565 - 2⁴ = 979549 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 979565.

It is not an unprimeable number, because it can be changed into a prime (979567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97952 + ... + 97961.

It is an arithmetic number, because the mean of its divisors is an integer number (293871).

2⁹⁷⁹⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

979565 is a deficient number, since it is larger than the sum of its proper divisors (195919).

979565 is a wasteful number, since it uses less digits than its factorization.

979565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195918.

The product of its digits is 85050, while the sum is 41.

The square root of 979565 is about 989.7297610964. The cubic root of 979565 is about 99.3141400490.

The spelling of 979565 in words is "nine hundred seventy-nine thousand, five hundred sixty-five".