189042565 has 8 divisors (see below), whose sum is σ = 227015928. Its totient is φ = 151124160.

The previous prime is 189042527. The next prime is 189042587. The reversal of 189042565 is 565240981.

It can be written as a sum of positive squares in 4 ways, for example, as 127983969 + 61058596 = 11313^2 + 7814^2 .

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

It is not a de Polignac number, because 189042565 - 2¹¹ = 189040517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5746 + ... + 20275.

It is an arithmetic number, because the mean of its divisors is an integer number (28376991).

Almost surely, 2^189042565 is an apocalyptic number.

It is an amenable number.

189042565 is a deficient number, since it is larger than the sum of its proper divisors (37973363).

189042565 is a wasteful number, since it uses less digits than its factorization.

189042565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27479.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 189042565 is about 13749.2750717992. The cubic root of 189042565 is about 573.9224330349.

The spelling of 189042565 in words is "one hundred eighty-nine million, forty-two thousand, five hundred sixty-five".