189889706 has 8 divisors (see below), whose sum is σ = 289504164. Its totient is φ = 93388320.

The previous prime is 189889703. The next prime is 189889741. The reversal of 189889706 is 607988981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 167469481 + 22420225 = 12941^2 + 4735^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (189889703) 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, 778115 + ... + 778358.

Almost surely, 2^189889706 is an apocalyptic number.

189889706 is a deficient number, since it is larger than the sum of its proper divisors (99614458).

189889706 is a wasteful number, since it uses less digits than its factorization.

189889706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556536.

The product of its (nonzero) digits is 1741824, while the sum is 56.

The square root of 189889706 is about 13780.0473874367. The cubic root of 189889706 is about 574.7784462129.

The spelling of 189889706 in words is "one hundred eighty-nine million, eight hundred eighty-nine thousand, seven hundred six".