123379189 has 2 divisors, whose sum is σ = 123379190. Its totient is φ = 123379188.

The previous prime is 123379147. The next prime is 123379211. The reversal of 123379189 is 981973321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85655025 + 37724164 = 9255^2 + 6142^2 .

It is a cyclic number.

It is not a de Polignac number, because 123379189 - 2¹¹ = 123377141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123379589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61689594 + 61689595.

It is an arithmetic number, because the mean of its divisors is an integer number (61689595).

Almost surely, 2^123379189 is an apocalyptic number.

It is an amenable number.

123379189 is a deficient number, since it is larger than the sum of its proper divisors (1).

123379189 is an equidigital number, since it uses as much as digits as its factorization.

123379189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 123379189 is about 11107.6185116343. The cubic root of 123379189 is about 497.8295102488.

The spelling of 123379189 in words is "one hundred twenty-three million, three hundred seventy-nine thousand, one hundred eighty-nine".