16979231 has 2 divisors, whose sum is σ = 16979232. Its totient is φ = 16979230.

The previous prime is 16979213. The next prime is 16979251. The reversal of 16979231 is 13297961.

It is a happy number.

Together with previous prime (16979213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16979231 - 2¹⁰ = 16978207 is a prime.

It is a super-2 number, since 2×16979231² = 576588570702722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16979201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8489615 + 8489616.

It is an arithmetic number, because the mean of its divisors is an integer number (8489616).

Almost surely, 2^16979231 is an apocalyptic number.

16979231 is a deficient number, since it is larger than the sum of its proper divisors (1).

16979231 is an equidigital number, since it uses as much as digits as its factorization.

16979231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 38.

The square root of 16979231 is about 4120.5862446987. The cubic root of 16979231 is about 257.0234047331.

The spelling of 16979231 in words is "sixteen million, nine hundred seventy-nine thousand, two hundred thirty-one".