16979687 has 4 divisors (see below), whose sum is σ = 17170560. Its totient is φ = 16788816.

The previous prime is 16979671. The next prime is 16979689. The reversal of 16979687 is 78697961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16979687 - 2⁴ = 16979671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16979689) 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, 95303 + ... + 95480.

It is an arithmetic number, because the mean of its divisors is an integer number (4292640).

Almost surely, 2^16979687 is an apocalyptic number.

16979687 is a deficient number, since it is larger than the sum of its proper divisors (190873).

16979687 is an equidigital number, since it uses as much as digits as its factorization.

16979687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190872.

The product of its digits is 1143072, while the sum is 53.

The square root of 16979687 is about 4120.6415762597. The cubic root of 16979687 is about 257.0257056151.

The spelling of 16979687 in words is "sixteen million, nine hundred seventy-nine thousand, six hundred eighty-seven".