16810979 has 4 divisors (see below), whose sum is σ = 17201976. Its totient is φ = 16419984.

The previous prime is 16810933. The next prime is 16810993. The reversal of 16810979 is 97901861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97901861 = 17 ⋅5758933.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16810979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16810279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195434 + ... + 195519.

It is an arithmetic number, because the mean of its divisors is an integer number (4300494).

Almost surely, 2^16810979 is an apocalyptic number.

16810979 is a deficient number, since it is larger than the sum of its proper divisors (390997).

16810979 is an equidigital number, since it uses as much as digits as its factorization.

16810979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390996.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 16810979 is about 4100.1193885057. The cubic root of 16810979 is about 256.1716124304.

The spelling of 16810979 in words is "sixteen million, eight hundred ten thousand, nine hundred seventy-nine".