123110189 has 2 divisors, whose sum is σ = 123110190. Its totient is φ = 123110188.

The previous prime is 123110179. The next prime is 123110219. The reversal of 123110189 is 981011321.

123110189 is nontrivially palindromic in base 3.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113592964 + 9517225 = 10658^2 + 3085^2 .

It is a cyclic number.

It is not a de Polignac number, because 123110189 - 2⁴ = 123110173 is a prime.

It is a super-2 number, since 2×123110189² = 30312237271231442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123110179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61555094 + 61555095.

It is an arithmetic number, because the mean of its divisors is an integer number (61555095).

Almost surely, 2^123110189 is an apocalyptic number.

It is an amenable number.

123110189 is a deficient number, since it is larger than the sum of its proper divisors (1).

123110189 is an equidigital number, since it uses as much as digits as its factorization.

123110189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 26.

The square root of 123110189 is about 11095.5030981024. The cubic root of 123110189 is about 497.4674459983.

The spelling of 123110189 in words is "one hundred twenty-three million, one hundred ten thousand, one hundred eighty-nine".