189439713 has 6 divisors (see below), whose sum is σ = 273635154. Its totient is φ = 126293136.

The previous prime is 189439699. The next prime is 189439759. The reversal of 189439713 is 317934981.

It can be written as a sum of positive squares in only one way, i.e., 109998144 + 79441569 = 10488^2 + 8913^2 .

It is not a de Polignac number, because 189439713 - 2⁸ = 189439457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189439213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10524420 + ... + 10524437.

It is an arithmetic number, because the mean of its divisors is an integer number (45605859).

Almost surely, 2^189439713 is an apocalyptic number.

It is an amenable number.

189439713 is a deficient number, since it is larger than the sum of its proper divisors (84195441).

189439713 is a wasteful number, since it uses less digits than its factorization.

189439713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21048863 (or 21048860 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 189439713 is about 13763.7100013042. The cubic root of 189439713 is about 574.3240581331.

The spelling of 189439713 in words is "one hundred eighty-nine million, four hundred thirty-nine thousand, seven hundred thirteen".