16516979 has 8 divisors (see below), whose sum is σ = 18092160. Its totient is φ = 15008896.

The previous prime is 16516963. The next prime is 16516993. The reversal of 16516979 is 97961561.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16516979 - 2⁴ = 16516963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16516919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16259 + ... + 17244.

It is an arithmetic number, because the mean of its divisors is an integer number (2261520).

Almost surely, 2^16516979 is an apocalyptic number.

16516979 is a deficient number, since it is larger than the sum of its proper divisors (1575181).

16516979 is a wasteful number, since it uses less digits than its factorization.

16516979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33549.

The product of its digits is 102060, while the sum is 44.

The square root of 16516979 is about 4064.1086353591. The cubic root of 16516979 is about 254.6694628023.

The spelling of 16516979 in words is "sixteen million, five hundred sixteen thousand, nine hundred seventy-nine".