16890569 has 4 divisors (see below), whose sum is σ = 16902096. Its totient is φ = 16879044.

The previous prime is 16890541. The next prime is 16890581. The reversal of 16890569 is 96509861.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16890569 - 2²⁰ = 15841993 is a prime.

It is a super-2 number, since 2×16890569² = 570582642287522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16890539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3179 + ... + 6624.

It is an arithmetic number, because the mean of its divisors is an integer number (4225524).

Almost surely, 2^16890569 is an apocalyptic number.

It is an amenable number.

16890569 is a deficient number, since it is larger than the sum of its proper divisors (11527).

16890569 is an equidigital number, since it uses as much as digits as its factorization.

16890569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11526.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 16890569 is about 4109.8137427382. The cubic root of 16890569 is about 256.5752495787.

The spelling of 16890569 in words is "sixteen million, eight hundred ninety thousand, five hundred sixty-nine".