16091889 has 16 divisors (see below), whose sum is σ = 23474880. Its totient is φ = 9724160.

The previous prime is 16091869. The next prime is 16091899. The reversal of 16091889 is 98819061.

It is a cyclic number.

It is not a de Polignac number, because 16091889 - 2⁵ = 16091857 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16091889.

It is not an unprimeable number, because it can be changed into a prime (16091869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18349 + ... + 19205.

It is an arithmetic number, because the mean of its divisors is an integer number (1467180).

Almost surely, 2^16091889 is an apocalyptic number.

It is an amenable number.

16091889 is a deficient number, since it is larger than the sum of its proper divisors (7382991).

16091889 is a wasteful number, since it uses less digits than its factorization.

16091889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 16091889 is about 4011.4696808028. The cubic root of 16091889 is about 252.4656764768.

The spelling of 16091889 in words is "sixteen million, ninety-one thousand, eight hundred eighty-nine".