189943365 has 16 divisors (see below), whose sum is σ = 311322816. Its totient is φ = 98832000.

The previous prime is 189943343. The next prime is 189943381. The reversal of 189943365 is 563349981.

It is not a de Polignac number, because 189943365 - 2⁵ = 189943333 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 153811 + ... + 155040.

It is an arithmetic number, because the mean of its divisors is an integer number (19457676).

Almost surely, 2^189943365 is an apocalyptic number.

189943365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189943365 is a deficient number, since it is larger than the sum of its proper divisors (121379451).

189943365 is a wasteful number, since it uses less digits than its factorization.

189943365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308900.

The product of its digits is 699840, while the sum is 48.

The square root of 189943365 is about 13781.9942316052. The cubic root of 189943365 is about 574.8325813784.

The spelling of 189943365 in words is "one hundred eighty-nine million, nine hundred forty-three thousand, three hundred sixty-five".