979919 has 2 divisors, whose sum is σ = 979920. Its totient is φ = 979918.

The previous prime is 979907. The next prime is 979921. The reversal of 979919 is 919979.

It is a strong prime.

It is an emirp because it is prime and its reverse (919979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 979919 - 2¹² = 975823 is a prime.

It is a super-2 number, since 2×979919² = 1920482493122, which contains 22 as substring.

Together with 979921, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 979919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (979949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489959 + 489960.

It is an arithmetic number, because the mean of its divisors is an integer number (489960).

2⁹⁷⁹⁹¹⁹ is an apocalyptic number.

979919 is a deficient number, since it is larger than the sum of its proper divisors (1).

979919 is an equidigital number, since it uses as much as digits as its factorization.

979919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45927, while the sum is 44.

The square root of 979919 is about 989.9085816377. The cubic root of 979919 is about 99.3261021517.

The spelling of 979919 in words is "nine hundred seventy-nine thousand, nine hundred nineteen".