189389895 has 8 divisors (see below), whose sum is σ = 303023856. Its totient is φ = 101007936.

The previous prime is 189389887. The next prime is 189389899. The reversal of 189389895 is 598983981.

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

It is not a de Polignac number, because 189389895 - 2³ = 189389887 is a prime.

It is a super-2 number, since 2×189389895² = 71737064656222050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189389899) 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, 6312982 + ... + 6313011.

It is an arithmetic number, because the mean of its divisors is an integer number (37877982).

Almost surely, 2^189389895 is an apocalyptic number.

189389895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189389895 is a deficient number, since it is larger than the sum of its proper divisors (113633961).

189389895 is a wasteful number, since it uses less digits than its factorization.

189389895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12626001.

The product of its digits is 5598720, while the sum is 60.

The square root of 189389895 is about 13761.9001231661. The cubic root of 189389895 is about 574.2737093372.

The spelling of 189389895 in words is "one hundred eighty-nine million, three hundred eighty-nine thousand, eight hundred ninety-five".