979669 has 4 divisors (see below), whose sum is σ = 1002496. Its totient is φ = 956844.

The previous prime is 979651. The next prime is 979691. The reversal of 979669 is 966979.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 966979 = 13 ⋅74383.

It is a cyclic number.

It is not a de Polignac number, because 979669 - 2⁷ = 979541 is a prime.

It is a super-2 number, since 2×979669² = 1919502699122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (979369) 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, 11349 + ... + 11434.

It is an arithmetic number, because the mean of its divisors is an integer number (250624).

2⁹⁷⁹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

979669 is a deficient number, since it is larger than the sum of its proper divisors (22827).

979669 is a wasteful number, since it uses less digits than its factorization.

979669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22826.

The product of its digits is 183708, while the sum is 46.

The square root of 979669 is about 989.7822992962. The cubic root of 979669 is about 99.3176546380.

The spelling of 979669 in words is "nine hundred seventy-nine thousand, six hundred sixty-nine".