16890403 has 8 divisors (see below), whose sum is σ = 17218656. Its totient is φ = 16564800.

The previous prime is 16890397. The next prime is 16890409. The reversal of 16890403 is 30409861.

It is an interprime number because it is at equal distance from previous prime (16890397) and next prime (16890409).

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 16890403 - 2⁵ = 16890371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16890409) 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, 16033 + ... + 17053.

It is an arithmetic number, because the mean of its divisors is an integer number (2152332).

Almost surely, 2^16890403 is an apocalyptic number.

16890403 is a deficient number, since it is larger than the sum of its proper divisors (328253).

16890403 is a wasteful number, since it uses less digits than its factorization.

16890403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 16890403 is about 4109.7935471262. The cubic root of 16890403 is about 256.5744090380.

The spelling of 16890403 in words is "sixteen million, eight hundred ninety thousand, four hundred three".