189569665 has 16 divisors (see below), whose sum is σ = 235742400. Its totient is φ = 146168512.

The previous prime is 189569603. The next prime is 189569683. The reversal of 189569665 is 566965981.

It is a cyclic number.

It is not a de Polignac number, because 189569665 - 2⁹ = 189569153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147114 + ... + 148396.

It is an arithmetic number, because the mean of its divisors is an integer number (14733900).

Almost surely, 2^189569665 is an apocalyptic number.

It is an amenable number.

189569665 is a deficient number, since it is larger than the sum of its proper divisors (46172735).

189569665 is a wasteful number, since it uses less digits than its factorization.

189569665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336.

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

The square root of 189569665 is about 13768.4300121691. The cubic root of 189569665 is about 574.4553532021.

The spelling of 189569665 in words is "one hundred eighty-nine million, five hundred sixty-nine thousand, six hundred sixty-five".