123938439 has 8 divisors (see below), whose sum is σ = 167343360. Its totient is φ = 81579576.

The previous prime is 123938407. The next prime is 123938443. The reversal of 123938439 is 934839321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123938439 - 2⁵ = 123938407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123938439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123938459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261237 + ... + 261710.

It is an arithmetic number, because the mean of its divisors is an integer number (20917920).

Almost surely, 2^123938439 is an apocalyptic number.

123938439 is a deficient number, since it is larger than the sum of its proper divisors (43404921).

123938439 is an equidigital number, since it uses as much as digits as its factorization.

123938439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523029.

The product of its digits is 139968, while the sum is 42.

The square root of 123938439 is about 11132.7642120005. The cubic root of 123938439 is about 498.5805595240.

The spelling of 123938439 in words is "one hundred twenty-three million, nine hundred thirty-eight thousand, four hundred thirty-nine".