16679517 has 4 divisors (see below), whose sum is σ = 22239360. Its totient is φ = 11119676.

The previous prime is 16679513. The next prime is 16679527. The reversal of 16679517 is 71597661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16679517 - 2² = 16679513 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16679513) 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, 2779917 + ... + 2779922.

It is an arithmetic number, because the mean of its divisors is an integer number (5559840).

Almost surely, 2^16679517 is an apocalyptic number.

It is an amenable number.

16679517 is a deficient number, since it is larger than the sum of its proper divisors (5559843).

16679517 is an equidigital number, since it uses as much as digits as its factorization.

16679517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5559842.

The product of its digits is 79380, while the sum is 42.

The square root of 16679517 is about 4084.0564393750. The cubic root of 16679517 is about 255.5021094772.

The spelling of 16679517 in words is "sixteen million, six hundred seventy-nine thousand, five hundred seventeen".