189639313 has 16 divisors (see below), whose sum is σ = 197842176. Its totient is φ = 181659520.

The previous prime is 189639299. The next prime is 189639343. The reversal of 189639313 is 313936981.

It is a happy number.

189639313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 189639313 - 2¹³ = 189631121 is a prime.

It is a super-2 number, since 2×189639313² = 71926138070223938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 189639313.

It is not an unprimeable number, because it can be changed into a prime (189639343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674733 + ... + 675013.

It is an arithmetic number, because the mean of its divisors is an integer number (12365136).

Almost surely, 2^189639313 is an apocalyptic number.

It is an amenable number.

189639313 is a deficient number, since it is larger than the sum of its proper divisors (8202863).

189639313 is a wasteful number, since it uses less digits than its factorization.

189639313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584.

The product of its digits is 104976, while the sum is 43.

The square root of 189639313 is about 13770.9590443077. The cubic root of 189639313 is about 574.5256963265.

It can be divided in two parts, 1896 and 39313, that added together give a square (41209 = 203²).

The spelling of 189639313 in words is "one hundred eighty-nine million, six hundred thirty-nine thousand, three hundred thirteen".