189665965 has 8 divisors (see below), whose sum is σ = 230480640. Its totient is φ = 149811792.

The previous prime is 189665963. The next prime is 189665969. The reversal of 189665965 is 569566981.

189665965 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 189665965 - 2¹ = 189665963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189665963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239689 + ... + 240478.

It is an arithmetic number, because the mean of its divisors is an integer number (28810080).

Almost surely, 2^189665965 is an apocalyptic number.

It is an amenable number.

189665965 is a deficient number, since it is larger than the sum of its proper divisors (40814675).

189665965 is an equidigital number, since it uses as much as digits as its factorization.

189665965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480251.

The product of its digits is 3499200, while the sum is 55.

The square root of 189665965 is about 13771.9266989046. The cubic root of 189665965 is about 574.5526097714.

The spelling of 189665965 in words is "one hundred eighty-nine million, six hundred sixty-five thousand, nine hundred sixty-five".