13123439 has 8 divisors (see below), whose sum is σ = 15880608. Its totient is φ = 10586880.

The previous prime is 13123423. The next prime is 13123441. The reversal of 13123439 is 93432131.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13123439 - 2⁴ = 13123423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13123459) 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, 55022 + ... + 55259.

It is an arithmetic number, because the mean of its divisors is an integer number (1985076).

Almost surely, 2^13123439 is an apocalyptic number.

13123439 is a deficient number, since it is larger than the sum of its proper divisors (2757169).

13123439 is a wasteful number, since it uses less digits than its factorization.

13123439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110305.

The product of its digits is 1944, while the sum is 26.

The square root of 13123439 is about 3622.6287416736. The cubic root of 13123439 is about 235.8753471272.

The spelling of 13123439 in words is "thirteen million, one hundred twenty-three thousand, four hundred thirty-nine".