189336985 has 8 divisors (see below), whose sum is σ = 230929416. Its totient is φ = 148986240.

The previous prime is 189336967. The next prime is 189336991. The reversal of 189336985 is 589633981.

It can be written as a sum of positive squares in 4 ways, for example, as 14462809 + 174874176 = 3803^2 + 13224^2 .

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

It is not a de Polignac number, because 189336985 - 2⁷ = 189336857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310084 + ... + 310693.

It is an arithmetic number, because the mean of its divisors is an integer number (28866177).

Almost surely, 2^189336985 is an apocalyptic number.

It is an amenable number.

189336985 is a deficient number, since it is larger than the sum of its proper divisors (41592431).

189336985 is an equidigital number, since it uses as much as digits as its factorization.

189336985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620843.

The product of its digits is 1399680, while the sum is 52.

The square root of 189336985 is about 13759.9776525981. The cubic root of 189336985 is about 574.2202259277.

The spelling of 189336985 in words is "one hundred eighty-nine million, three hundred thirty-six thousand, nine hundred eighty-five".