16989051 has 4 divisors (see below), whose sum is σ = 22652072. Its totient is φ = 11326032.

The previous prime is 16989013. The next prime is 16989079. The reversal of 16989051 is 15098961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15098961 = 3 ⋅5032987.

It is not a de Polignac number, because 16989051 - 2⁶ = 16988987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16909051) 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, 2831506 + ... + 2831511.

It is an arithmetic number, because the mean of its divisors is an integer number (5663018).

Almost surely, 2^16989051 is an apocalyptic number.

16989051 is a deficient number, since it is larger than the sum of its proper divisors (5663021).

16989051 is an equidigital number, since it uses as much as digits as its factorization.

16989051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5663020.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 16989051 is about 4121.7776504804. Note that the first 3 decimals coincide. The cubic root of 16989051 is about 257.0729453240.

The spelling of 16989051 in words is "sixteen million, nine hundred eighty-nine thousand, fifty-one".