12439799 has 4 divisors (see below), whose sum is σ = 12447960. Its totient is φ = 12431640.

The previous prime is 12439783. The next prime is 12439829. The reversal of 12439799 is 99793421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12439799 - 2⁴ = 12439783 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12439199) 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, 1037 + ... + 5094.

It is an arithmetic number, because the mean of its divisors is an integer number (3111990).

Almost surely, 2^12439799 is an apocalyptic number.

12439799 is a deficient number, since it is larger than the sum of its proper divisors (8161).

12439799 is an equidigital number, since it uses as much as digits as its factorization.

12439799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8160.

The product of its digits is 122472, while the sum is 44.

The square root of 12439799 is about 3527.0099234337. The cubic root of 12439799 is about 231.7062709120.

The spelling of 12439799 in words is "twelve million, four hundred thirty-nine thousand, seven hundred ninety-nine".