16890889 has 4 divisors (see below), whose sum is σ = 16909056. Its totient is φ = 16872724.

The previous prime is 16890859. The next prime is 16890917. The reversal of 16890889 is 98809861.

It is a happy number.

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 16890889 - 2⁵ = 16890857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16890859) 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, 7609 + ... + 9574.

It is an arithmetic number, because the mean of its divisors is an integer number (4227264).

Almost surely, 2^16890889 is an apocalyptic number.

It is an amenable number.

16890889 is a deficient number, since it is larger than the sum of its proper divisors (18167).

16890889 is an equidigital number, since it uses as much as digits as its factorization.

16890889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18166.

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 16890889 is about 4109.8526737585. The cubic root of 16890889 is about 256.5768698825.

The spelling of 16890889 in words is "sixteen million, eight hundred ninety thousand, eight hundred eighty-nine".