979917 has 8 divisors (see below), whose sum is σ = 1331424. Its totient is φ = 640848.

The previous prime is 979907. The next prime is 979919. The reversal of 979917 is 719979.

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

It is a de Polignac number, because none of the positive numbers 2^k-979917 is a prime.

It is an Ulam 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 979917.

It is not an unprimeable number, because it can be changed into a prime (979919) 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, 2923 + ... + 3240.

It is an arithmetic number, because the mean of its divisors is an integer number (166428).

2⁹⁷⁹⁹¹⁷ is an apocalyptic number.

It is an amenable number.

979917 is a deficient number, since it is larger than the sum of its proper divisors (351507).

979917 is a wasteful number, since it uses less digits than its factorization.

979917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6219.

The product of its digits is 35721, while the sum is 42.

The square root of 979917 is about 989.9075714429. The cubic root of 979917 is about 99.3260345773.

The spelling of 979917 in words is "nine hundred seventy-nine thousand, nine hundred seventeen".