124239889 has 2 divisors, whose sum is σ = 124239890. Its totient is φ = 124239888.

The previous prime is 124239883. The next prime is 124239919. The reversal of 124239889 is 988932421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93934864 + 30305025 = 9692^2 + 5505^2 .

It is an emirp because it is prime and its reverse (988932421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124239889 - 2²⁵ = 90685457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (124239883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62119944 + 62119945.

It is an arithmetic number, because the mean of its divisors is an integer number (62119945).

Almost surely, 2^124239889 is an apocalyptic number.

It is an amenable number.

124239889 is a deficient number, since it is larger than the sum of its proper divisors (1).

124239889 is an equidigital number, since it uses as much as digits as its factorization.

124239889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 46.

The square root of 124239889 is about 11146.2948552423. The cubic root of 124239889 is about 498.9844574096.

The spelling of 124239889 in words is "one hundred twenty-four million, two hundred thirty-nine thousand, eight hundred eighty-nine".