189801 has 6 divisors (see below), whose sum is σ = 274170. Its totient is φ = 126528.

The previous prime is 189799. The next prime is 189817. The reversal of 189801 is 108981.

It can be written as a sum of positive squares in only one way, i.e., 189225 + 576 = 435^2 + 24^2 .

It is not a de Polignac number, because 189801 - 2¹ = 189799 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10536 + ... + 10553.

It is an arithmetic number, because the mean of its divisors is an integer number (45695).

2¹⁸⁹⁸⁰¹ is an apocalyptic number.

It is an amenable number.

189801 is a deficient number, since it is larger than the sum of its proper divisors (84369).

189801 is a wasteful number, since it uses less digits than its factorization.

189801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21095 (or 21092 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 189801 is about 435.6615658972. The cubic root of 189801 is about 57.4688930674.

Subtracting from 189801 its product of nonzero digits (576), we obtain a square (189225 = 435²).

It can be divided in two parts, 18980 and 1, that added together give a palindrome (18981).

The spelling of 189801 in words is "one hundred eighty-nine thousand, eight hundred one".