16890859 has 2 divisors, whose sum is σ = 16890860. Its totient is φ = 16890858.

The previous prime is 16890857. The next prime is 16890917. The reversal of 16890859 is 95809861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16890859 - 2¹ = 16890857 is a prime.

It is a super-2 number, since 2×16890859² = 570602235515762, which contains 22 as substring.

Together with 16890857, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16890857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8445429 + 8445430.

It is an arithmetic number, because the mean of its divisors is an integer number (8445430).

Almost surely, 2^16890859 is an apocalyptic number.

16890859 is a deficient number, since it is larger than the sum of its proper divisors (1).

16890859 is an equidigital number, since it uses as much as digits as its factorization.

16890859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 16890859 is about 4109.8490239910. The cubic root of 16890859 is about 256.5767179799.

The spelling of 16890859 in words is "sixteen million, eight hundred ninety thousand, eight hundred fifty-nine".