189427089 has 4 divisors (see below), whose sum is σ = 252569456. Its totient is φ = 126284724.

The previous prime is 189427033. The next prime is 189427099. The reversal of 189427089 is 980724981.

189427089 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 980724981 = 3 ⋅326908327.

It is not a de Polignac number, because 189427089 - 2⁹ = 189426577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189427099) 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, 31571179 + ... + 31571184.

It is an arithmetic number, because the mean of its divisors is an integer number (63142364).

Almost surely, 2^189427089 is an apocalyptic number.

It is an amenable number.

189427089 is a deficient number, since it is larger than the sum of its proper divisors (63142367).

189427089 is an equidigital number, since it uses as much as digits as its factorization.

189427089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63142366.

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 189427089 is about 13763.2513963816. The cubic root of 189427089 is about 574.3113004633.

The spelling of 189427089 in words is "one hundred eighty-nine million, four hundred twenty-seven thousand, eighty-nine".