189828123 has 4 divisors (see below), whose sum is σ = 253104168. Its totient is φ = 126552080.

The previous prime is 189828109. The next prime is 189828151. The reversal of 189828123 is 321828981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321828981 = 3 ⋅107276327.

It is a cyclic number.

It is not a de Polignac number, because 189828123 - 2⁵ = 189828091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189828173) 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, 31638018 + ... + 31638023.

It is an arithmetic number, because the mean of its divisors is an integer number (63276042).

Almost surely, 2^189828123 is an apocalyptic number.

189828123 is a deficient number, since it is larger than the sum of its proper divisors (63276045).

189828123 is an equidigital number, since it uses as much as digits as its factorization.

189828123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63276044.

The product of its digits is 55296, while the sum is 42.

The square root of 189828123 is about 13777.8127073930. The cubic root of 189828123 is about 574.7163041604.

The spelling of 189828123 in words is "one hundred eighty-nine million, eight hundred twenty-eight thousand, one hundred twenty-three".