189448689 has 4 divisors (see below), whose sum is σ = 252598256. Its totient is φ = 126299124.

The previous prime is 189448643. The next prime is 189448709. The reversal of 189448689 is 986844981.

189448689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 de Polignac number, because none of the positive numbers 2^k-189448689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189440689) 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, 31574779 + ... + 31574784.

It is an arithmetic number, because the mean of its divisors is an integer number (63149564).

Almost surely, 2^189448689 is an apocalyptic number.

It is an amenable number.

189448689 is a deficient number, since it is larger than the sum of its proper divisors (63149567).

189448689 is an equidigital number, since it uses as much as digits as its factorization.

189448689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63149566.

The product of its digits is 3981312, while the sum is 57.

The square root of 189448689 is about 13764.0360723154. The cubic root of 189448689 is about 574.3331288312. Note that the first 3 decimals are identical.

It can be divided in two parts, 189 and 448689, that added together give a triangular number (448878 = T₉₄₇).

The spelling of 189448689 in words is "one hundred eighty-nine million, four hundred forty-eight thousand, six hundred eighty-nine".