189895489 has 8 divisors (see below), whose sum is σ = 218356160. Its totient is φ = 161768016.

The previous prime is 189895471. The next prime is 189895493. The reversal of 189895489 is 984598981.

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 189895489 - 2¹⁷ = 189764417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189895469) 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, 82074 + ... + 84355.

It is an arithmetic number, because the mean of its divisors is an integer number (27294520).

Almost surely, 2^189895489 is an apocalyptic number.

It is an amenable number.

189895489 is a deficient number, since it is larger than the sum of its proper divisors (28460671).

189895489 is a wasteful number, since it uses less digits than its factorization.

189895489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166599.

The product of its digits is 7464960, while the sum is 61.

The square root of 189895489 is about 13780.2572182090. The cubic root of 189895489 is about 574.7842810210.

The spelling of 189895489 in words is "one hundred eighty-nine million, eight hundred ninety-five thousand, four hundred eighty-nine".