230191189 has 4 divisors (see below), whose sum is σ = 230402124. Its totient is φ = 229980256.

The previous prime is 230191187. The next prime is 230191193. The reversal of 230191189 is 981191032.

230191189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 148596100 + 81595089 = 12190^2 + 9033^2 .

It is a cyclic number.

It is not a de Polignac number, because 230191189 - 2¹ = 230191187 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 (230191187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103822 + ... + 106015.

It is an arithmetic number, because the mean of its divisors is an integer number (57600531).

Almost surely, 2^230191189 is an apocalyptic number.

It is an amenable number.

230191189 is a deficient number, since it is larger than the sum of its proper divisors (210935).

230191189 is a wasteful number, since it uses less digits than its factorization.

230191189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210934.

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

The square root of 230191189 is about 15172.0528933958. The cubic root of 230191189 is about 612.8622887351.

The spelling of 230191189 in words is "two hundred thirty million, one hundred ninety-one thousand, one hundred eighty-nine".