979831 has 2 divisors, whose sum is σ = 979832. Its totient is φ = 979830.

The previous prime is 979819. The next prime is 979873. The reversal of 979831 is 138979.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 979831 - 2¹³ = 971639 is a prime.

It is a super-2 number, since 2×979831² = 1920137577122, which contains 22 as substring.

It is a Chen prime.

979831 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (979031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489915 + 489916.

It is an arithmetic number, because the mean of its divisors is an integer number (489916).

2⁹⁷⁹⁸³¹ is an apocalyptic number.

979831 is a deficient number, since it is larger than the sum of its proper divisors (1).

979831 is an equidigital number, since it uses as much as digits as its factorization.

979831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 979831 is about 989.8641320909. The cubic root of 979831 is about 99.3231287907.

The spelling of 979831 in words is "nine hundred seventy-nine thousand, eight hundred thirty-one".