124123189 has 2 divisors, whose sum is σ = 124123190. Its totient is φ = 124123188.

The previous prime is 124123187. The next prime is 124123201. The reversal of 124123189 is 981321421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120626289 + 3496900 = 10983^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 124123189 - 2¹ = 124123187 is a prime.

Together with 124123187, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 124123189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124123183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62061594 + 62061595.

It is an arithmetic number, because the mean of its divisors is an integer number (62061595).

Almost surely, 2^124123189 is an apocalyptic number.

It is an amenable number.

124123189 is a deficient number, since it is larger than the sum of its proper divisors (1).

124123189 is an equidigital number, since it uses as much as digits as its factorization.

124123189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 31.

The square root of 124123189 is about 11141.0587019367. The cubic root of 124123189 is about 498.8281744620.

The spelling of 124123189 in words is "one hundred twenty-four million, one hundred twenty-three thousand, one hundred eighty-nine".