189975 has 24 divisors (see below), whose sum is σ = 334800. Its totient is φ = 94720.

The previous prime is 189967. The next prime is 189977. The reversal of 189975 is 579981.

It is a happy number.

It is not a de Polignac number, because 189975 - 2³ = 189967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1201 + ... + 1349.

It is an arithmetic number, because the mean of its divisors is an integer number (13950).

2¹⁸⁹⁹⁷⁵ is an apocalyptic number.

189975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189975 is a deficient number, since it is larger than the sum of its proper divisors (144825).

189975 is a wasteful number, since it uses less digits than its factorization.

189975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 174 counting only the distinct ones).

The product of its digits is 22680, while the sum is 39.

The square root of 189975 is about 435.8612164440. The cubic root of 189975 is about 57.4864492328.

The spelling of 189975 in words is "one hundred eighty-nine thousand, nine hundred seventy-five".