189001 has 4 divisors (see below), whose sum is σ = 189904. Its totient is φ = 188100.

The previous prime is 188999. The next prime is 189011. The reversal of 189001 is 100981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 189001 - 2¹ = 188999 is a prime.

It is a Duffinian number.

189001 is a lucky number.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 189001.

It is not an unprimeable number, because it can be changed into a prime (189011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46 + ... + 616.

It is an arithmetic number, because the mean of its divisors is an integer number (47476).

2¹⁸⁹⁰⁰¹ is an apocalyptic number.

It is an amenable number.

189001 is a deficient number, since it is larger than the sum of its proper divisors (903).

189001 is an equidigital number, since it uses as much as digits as its factorization.

189001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 189001 is about 434.7424524934. The cubic root of 189001 is about 57.3880366963.

Adding to 189001 its reverse (100981), we get a palindrome (289982).

The spelling of 189001 in words is "one hundred eighty-nine thousand, one".