189038091 has 16 divisors (see below), whose sum is σ = 275194368. Its totient is φ = 114472800.

The previous prime is 189038071. The next prime is 189038107. The reversal of 189038091 is 190830981.

It is a happy number.

189038091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-189038091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189038071) 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, 76030 + ... + 78476.

It is an arithmetic number, because the mean of its divisors is an integer number (17199648).

Almost surely, 2^189038091 is an apocalyptic number.

189038091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

189038091 is a deficient number, since it is larger than the sum of its proper divisors (86156277).

189038091 is a wasteful number, since it uses less digits than its factorization.

189038091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4802.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 189038091 is about 13749.1123713497. The cubic root of 189038091 is about 573.9179053963.

The spelling of 189038091 in words is "one hundred eighty-nine million, thirty-eight thousand, ninety-one".