189281191 has 16 divisors (see below), whose sum is σ = 216649728. Its totient is φ = 163688800.

The previous prime is 189281177. The next prime is 189281207. The reversal of 189281191 is 191182981.

189281191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189281191 - 2¹⁷ = 189150119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189281291) 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, 46365 + ... + 50281.

It is an arithmetic number, because the mean of its divisors is an integer number (13540608).

Almost surely, 2^189281191 is an apocalyptic number.

189281191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

189281191 is a deficient number, since it is larger than the sum of its proper divisors (27368537).

189281191 is a wasteful number, since it uses less digits than its factorization.

189281191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142.

The product of its digits is 10368, while the sum is 40.

The square root of 189281191 is about 13757.9501016685. The cubic root of 189281191 is about 574.1638164685.

The spelling of 189281191 in words is "one hundred eighty-nine million, two hundred eighty-one thousand, one hundred ninety-one".