979889 has 2 divisors, whose sum is σ = 979890. Its totient is φ = 979888.

The previous prime is 979883. The next prime is 979907. The reversal of 979889 is 988979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640000 + 339889 = 800^2 + 583^2 .

It is an emirp because it is prime and its reverse (988979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 979889 - 2⁴ = 979873 is a prime.

It is not a weakly prime, because it can be changed into another prime (979883) 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 as a sum of consecutive naturals, namely, 489944 + 489945.

It is an arithmetic number, because the mean of its divisors is an integer number (489945).

2⁹⁷⁹⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

979889 is a deficient number, since it is larger than the sum of its proper divisors (1).

979889 is an equidigital number, since it uses as much as digits as its factorization.

979889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 50.

The square root of 979889 is about 989.8934286073. The cubic root of 979889 is about 99.3250885259.

The spelling of 979889 in words is "nine hundred seventy-nine thousand, eight hundred eighty-nine".