189923489 has 8 divisors (see below), whose sum is σ = 226492800. Its totient is φ = 155713536.

The previous prime is 189923483. The next prime is 189923491. The reversal of 189923489 is 984329981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189923489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 189923489.

It is not an unprimeable number, because it can be changed into a prime (189923483) 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, 589664 + ... + 589985.

It is an arithmetic number, because the mean of its divisors is an integer number (28311600).

Almost surely, 2^189923489 is an apocalyptic number.

It is an amenable number.

189923489 is a deficient number, since it is larger than the sum of its proper divisors (36569311).

189923489 is a wasteful number, since it uses less digits than its factorization.

189923489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179679.

The product of its digits is 1119744, while the sum is 53.

The square root of 189923489 is about 13781.2731269647. The cubic root of 189923489 is about 574.8125301894.

The spelling of 189923489 in words is "one hundred eighty-nine million, nine hundred twenty-three thousand, four hundred eighty-nine".