16090891 has 16 divisors (see below), whose sum is σ = 18524160. Its totient is φ = 13875840.

The previous prime is 16090889. The next prime is 16090931. The reversal of 16090891 is 19809061.

It is a cyclic number.

It is not a de Polignac number, because 16090891 - 2¹ = 16090889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16090831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9210 + ... + 10816.

It is an arithmetic number, because the mean of its divisors is an integer number (1157760).

Almost surely, 2^16090891 is an apocalyptic number.

16090891 is a deficient number, since it is larger than the sum of its proper divisors (2433269).

16090891 is a wasteful number, since it uses less digits than its factorization.

16090891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 16090891 is about 4011.3452855619. The cubic root of 16090891 is about 252.4604571610.

The spelling of 16090891 in words is "sixteen million, ninety thousand, eight hundred ninety-one".