189995 has 16 divisors (see below), whose sum is σ = 255360. Its totient is φ = 134784.

The previous prime is 189989. The next prime is 189997. The reversal of 189995 is 599981.

189995 = T₂₆ + T₂₇ + ... + T₁₀₄.

It is not a de Polignac number, because 189995 - 2¹⁶ = 124459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189997) 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, 2366 + ... + 2444.

It is an arithmetic number, because the mean of its divisors is an integer number (15960).

2¹⁸⁹⁹⁹⁵ is an apocalyptic number.

189995 is a deficient number, since it is larger than the sum of its proper divisors (65365).

189995 is a wasteful number, since it uses less digits than its factorization.

189995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134.

The product of its digits is 29160, while the sum is 41.

The square root of 189995 is about 435.8841589230. The cubic root of 189995 is about 57.4884664958.

Adding to 189995 its sum of digits (41), we get a triangular number (190036 = T₆₁₆).

The spelling of 189995 in words is "one hundred eighty-nine thousand, nine hundred ninety-five".