189447 has 4 divisors (see below), whose sum is σ = 252600. Its totient is φ = 126296.

The previous prime is 189439. The next prime is 189463. The reversal of 189447 is 744981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189447 - 2³ = 189439 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189407) 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, 31572 + ... + 31577.

It is an arithmetic number, because the mean of its divisors is an integer number (63150).

2¹⁸⁹⁴⁴⁷ is an apocalyptic number.

189447 is a deficient number, since it is larger than the sum of its proper divisors (63153).

189447 is an equidigital number, since it uses as much as digits as its factorization.

189447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63152.

The product of its digits is 8064, while the sum is 33.

The square root of 189447 is about 435.2550976152. The cubic root of 189447 is about 57.4331422034.

It can be divided in two parts, 189 and 447, that added together give a palindrome (636).

The spelling of 189447 in words is "one hundred eighty-nine thousand, four hundred forty-seven".