189676765 has 8 divisors (see below), whose sum is σ = 227706840. Its totient is φ = 151678272.

The previous prime is 189676673. The next prime is 189676787. The reversal of 189676765 is 567676981.

189676765 = 9738² + 9739².

It can be written as a sum of positive squares in 4 ways, for example, as 16990884 + 172685881 = 4122^2 + 13141^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 189676765 - 2¹¹ = 189674717 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8371 + ... + 21199.

It is an arithmetic number, because the mean of its divisors is an integer number (28463355).

Almost surely, 2^189676765 is an apocalyptic number.

189676765 is the 9739-th centered square number.

It is an amenable number.

189676765 is a deficient number, since it is larger than the sum of its proper divisors (38030075).

189676765 is a wasteful number, since it uses less digits than its factorization.

189676765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15791.

The product of its digits is 3810240, while the sum is 55.

The square root of 189676765 is about 13772.3187953227. The cubic root of 189676765 is about 574.5635149970.

The spelling of 189676765 in words is "one hundred eighty-nine million, six hundred seventy-six thousand, seven hundred sixty-five".