189234865 has 4 divisors (see below), whose sum is σ = 227081844. Its totient is φ = 151387888.

The previous prime is 189234863. The next prime is 189234883. The reversal of 189234865 is 568432981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568432981 = 2957 ⋅192233.

It can be written as a sum of positive squares in 2 ways, for example, as 76195441 + 113039424 = 8729^2 + 10632^2 .

It is a cyclic number.

It is not a de Polignac number, because 189234865 - 2¹ = 189234863 is a prime.

It is a super-4 number, since 4×189234865⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189234863) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18923482 + ... + 18923491.

It is an arithmetic number, because the mean of its divisors is an integer number (56770461).

Almost surely, 2^189234865 is an apocalyptic number.

It is an amenable number.

189234865 is a deficient number, since it is larger than the sum of its proper divisors (37846979).

189234865 is an equidigital number, since it uses as much as digits as its factorization.

189234865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37846978.

The product of its digits is 414720, while the sum is 46.

The square root of 189234865 is about 13756.2663902674. The cubic root of 189234865 is about 574.1169710263.

The spelling of 189234865 in words is "one hundred eighty-nine million, two hundred thirty-four thousand, eight hundred sixty-five".