189043247 has 16 divisors (see below), whose sum is σ = 204236640. Its totient is φ = 174332928.

The previous prime is 189043241. The next prime is 189043271. The reversal of 189043247 is 742340981.

It is not a de Polignac number, because 189043247 - 2¹⁴ = 189026863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189043247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189043241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 306083 + ... + 306699.

It is an arithmetic number, because the mean of its divisors is an integer number (12764790).

Almost surely, 2^189043247 is an apocalyptic number.

189043247 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

189043247 is a deficient number, since it is larger than the sum of its proper divisors (15193393).

189043247 is a wasteful number, since it uses less digits than its factorization.

189043247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 189043247 is about 13749.2998730844. The cubic root of 189043247 is about 573.9231232051.

The spelling of 189043247 in words is "one hundred eighty-nine million, forty-three thousand, two hundred forty-seven".