12438999 has 12 divisors (see below), whose sum is σ = 18587400. Its totient is φ = 8006544.

The previous prime is 12438983. The next prime is 12439003. The reversal of 12438999 is 99983421.

It is not a de Polignac number, because 12438999 - 2⁴ = 12438983 is a prime.

It is a super-2 number, since 2×12438999² = 309457392244002, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12438299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23569 + ... + 24090.

It is an arithmetic number, because the mean of its divisors is an integer number (1548950).

Almost surely, 2^12438999 is an apocalyptic number.

12438999 is a deficient number, since it is larger than the sum of its proper divisors (6148401).

12438999 is a wasteful number, since it uses less digits than its factorization.

12438999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47694 (or 47691 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 12438999 is about 3526.8965110987. The cubic root of 12438999 is about 231.7013038170.

The spelling of 12438999 in words is "twelve million, four hundred thirty-eight thousand, nine hundred ninety-nine".