189428165 has 4 divisors (see below), whose sum is σ = 227313804. Its totient is φ = 151542528.

The previous prime is 189428137. The next prime is 189428167. The reversal of 189428165 is 561824981.

189428165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 561824981 = 47 ⋅11953723.

It can be written as a sum of positive squares in 2 ways, for example, as 92582884 + 96845281 = 9622^2 + 9841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189428165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189428167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18942812 + ... + 18942821.

It is an arithmetic number, because the mean of its divisors is an integer number (56828451).

Almost surely, 2^189428165 is an apocalyptic number.

It is an amenable number.

189428165 is a deficient number, since it is larger than the sum of its proper divisors (37885639).

189428165 is an equidigital number, since it uses as much as digits as its factorization.

189428165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37885638.

The product of its digits is 138240, while the sum is 44.

The square root of 189428165 is about 13763.2904859267. The cubic root of 189428165 is about 574.3123878786.

The spelling of 189428165 in words is "one hundred eighty-nine million, four hundred twenty-eight thousand, one hundred sixty-five".