189434023 has 4 divisors (see below), whose sum is σ = 189950560. Its totient is φ = 188917488.

The previous prime is 189433999. The next prime is 189434071. The reversal of 189434023 is 320434981.

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

It is a cyclic number.

It is not a de Polignac number, because 189434023 - 2⁹ = 189433511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189434023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189404023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257718 + ... + 258451.

It is an arithmetic number, because the mean of its divisors is an integer number (47487640).

Almost surely, 2^189434023 is an apocalyptic number.

189434023 is a deficient number, since it is larger than the sum of its proper divisors (516537).

189434023 is an equidigital number, since it uses as much as digits as its factorization.

189434023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516536.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 189434023 is about 13763.5032967628. The cubic root of 189434023 is about 574.3183079544.

The spelling of 189434023 in words is "one hundred eighty-nine million, four hundred thirty-four thousand, twenty-three".