189845 has 8 divisors (see below), whose sum is σ = 233376. Its totient is φ = 148176.

The previous prime is 189823. The next prime is 189851. The reversal of 189845 is 548981.

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 189845 - 2¹² = 185749 is a prime.

It is a super-2 number, since 2×189845² = 72082248050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227 + ... + 656.

It is an arithmetic number, because the mean of its divisors is an integer number (29172).

2¹⁸⁹⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

189845 is a deficient number, since it is larger than the sum of its proper divisors (43531).

189845 is an equidigital number, since it uses as much as digits as its factorization.

189845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931.

The product of its digits is 11520, while the sum is 35.

The square root of 189845 is about 435.7120608842. The cubic root of 189845 is about 57.4733335707.

The spelling of 189845 in words is "one hundred eighty-nine thousand, eight hundred forty-five".