16989983 has 8 divisors (see below), whose sum is σ = 17450688. Its totient is φ = 16533504.

The previous prime is 16989967. The next prime is 16989991. The reversal of 16989983 is 38998961.

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 16989983 - 2⁴ = 16989967 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 (16989943) 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, 8135 + ... + 10007.

It is an arithmetic number, because the mean of its divisors is an integer number (2181336).

Almost surely, 2^16989983 is an apocalyptic number.

16989983 is a deficient number, since it is larger than the sum of its proper divisors (460705).

16989983 is a wasteful number, since it uses less digits than its factorization.

16989983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113.

The product of its digits is 839808, while the sum is 53.

The square root of 16989983 is about 4121.8907069451. The cubic root of 16989983 is about 257.0776461477.

The spelling of 16989983 in words is "sixteen million, nine hundred eighty-nine thousand, nine hundred eighty-three".