189423389 has 8 divisors (see below), whose sum is σ = 196460760. Its totient is φ = 182419776.

The previous prime is 189423371. The next prime is 189423391. The reversal of 189423389 is 983324981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 86806489 + 102616900 = 9317^2 + 10130^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189423389 - 2⁸ = 189423133 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 (189423329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3287 + ... + 19739.

It is an arithmetic number, because the mean of its divisors is an integer number (24557595).

Almost surely, 2^189423389 is an apocalyptic number.

It is an amenable number.

189423389 is a deficient number, since it is larger than the sum of its proper divisors (7037371).

189423389 is a wasteful number, since it uses less digits than its factorization.

189423389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16879.

The product of its digits is 373248, while the sum is 47.

The square root of 189423389 is about 13763.1169798124. The cubic root of 189423389 is about 574.3075611782.

The spelling of 189423389 in words is "one hundred eighty-nine million, four hundred twenty-three thousand, three hundred eighty-nine".