189345 has 16 divisors (see below), whose sum is σ = 326592. Its totient is φ = 93120.

The previous prime is 189337. The next prime is 189347. The reversal of 189345 is 543981.

189345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189345 - 2³ = 189337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291 + ... + 680.

It is an arithmetic number, because the mean of its divisors is an integer number (20412).

2¹⁸⁹³⁴⁵ is an apocalyptic number.

189345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189345 is a deficient number, since it is larger than the sum of its proper divisors (137247).

189345 is a wasteful number, since it uses less digits than its factorization.

189345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992.

The product of its digits is 4320, while the sum is 30.

The square root of 189345 is about 435.1379091736. The cubic root of 189345 is about 57.4228328430.

The spelling of 189345 in words is "one hundred eighty-nine thousand, three hundred forty-five".