189897 has 4 divisors (see below), whose sum is σ = 253200. Its totient is φ = 126596.

The previous prime is 189887. The next prime is 189901. The reversal of 189897 is 798981.

189897 is nontrivially palindromic in base 13.

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.

It is a cyclic number.

It is not a de Polignac number, because 189897 - 2⁴ = 189881 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (189817) 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, 31647 + ... + 31652.

It is an arithmetic number, because the mean of its divisors is an integer number (63300).

2¹⁸⁹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

189897 is a deficient number, since it is larger than the sum of its proper divisors (63303).

189897 is an equidigital number, since it uses as much as digits as its factorization.

189897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63302.

The product of its digits is 36288, while the sum is 42.

The square root of 189897 is about 435.7717292345. The cubic root of 189897 is about 57.4785805538.

It can be divided in two parts, 1 and 89897, that added together give a palindrome (89898).

The spelling of 189897 in words is "one hundred eighty-nine thousand, eight hundred ninety-seven".