16191189 has 12 divisors (see below), whose sum is σ = 26728416. Its totient is φ = 9252072.

The previous prime is 16191179. The next prime is 16191223. The reversal of 16191189 is 98119161.

It is not a de Polignac number, because 16191189 - 2⁷ = 16191061 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16191139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128439 + ... + 128564.

It is an arithmetic number, because the mean of its divisors is an integer number (2227368).

Almost surely, 2^16191189 is an apocalyptic number.

It is an amenable number.

16191189 is a deficient number, since it is larger than the sum of its proper divisors (10537227).

16191189 is a wasteful number, since it uses less digits than its factorization.

16191189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257016 (or 257013 counting only the distinct ones).

The product of its digits is 3888, while the sum is 36.

The square root of 16191189 is about 4023.8276553550. The cubic root of 16191189 is about 252.9839179058.

The spelling of 16191189 in words is "sixteen million, one hundred ninety-one thousand, one hundred eighty-nine".