124989239 has 4 divisors (see below), whose sum is σ = 131567640. Its totient is φ = 118410840.

The previous prime is 124989233. The next prime is 124989247. The reversal of 124989239 is 932989421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124989239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124989193 and 124989202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124989233) 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, 3289172 + ... + 3289209.

It is an arithmetic number, because the mean of its divisors is an integer number (32891910).

Almost surely, 2^124989239 is an apocalyptic number.

124989239 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

124989239 is a deficient number, since it is larger than the sum of its proper divisors (6578401).

124989239 is an equidigital number, since it uses as much as digits as its factorization.

124989239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6578400.

The product of its digits is 279936, while the sum is 47.

The square root of 124989239 is about 11179.8586305910. The cubic root of 124989239 is about 499.9856515883.

The spelling of 124989239 in words is "one hundred twenty-four million, nine hundred eighty-nine thousand, two hundred thirty-nine".