189013889 has 4 divisors (see below), whose sum is σ = 189209520. Its totient is φ = 188818260.

The previous prime is 189013873. The next prime is 189013897. The reversal of 189013889 is 988310981.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 189013889 - 2⁴ = 189013873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189013849) 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, 96359 + ... + 98300.

It is an arithmetic number, because the mean of its divisors is an integer number (47302380).

Almost surely, 2^189013889 is an apocalyptic number.

It is an amenable number.

189013889 is a deficient number, since it is larger than the sum of its proper divisors (195631).

189013889 is an equidigital number, since it uses as much as digits as its factorization.

189013889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195630.

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 189013889 is about 13748.2322136339. The cubic root of 189013889 is about 573.8934120012.

The spelling of 189013889 in words is "one hundred eighty-nine million, thirteen thousand, eight hundred eighty-nine".