12918039 has 4 divisors (see below), whose sum is σ = 17224056. Its totient is φ = 8612024.

The previous prime is 12918029. The next prime is 12918049. The reversal of 12918039 is 93081921.

12918039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93081921 = 3 ⋅31027307.

It is an interprime number because it is at equal distance from previous prime (12918029) and next prime (12918049).

It is a cyclic number.

It is not a de Polignac number, because 12918039 - 2⁴ = 12918023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12918029) 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, 2153004 + ... + 2153009.

It is an arithmetic number, because the mean of its divisors is an integer number (4306014).

Almost surely, 2^12918039 is an apocalyptic number.

12918039 is a deficient number, since it is larger than the sum of its proper divisors (4306017).

12918039 is an equidigital number, since it uses as much as digits as its factorization.

12918039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306016.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 12918039 is about 3594.1673583738. The cubic root of 12918039 is about 234.6382785782.

The spelling of 12918039 in words is "twelve million, nine hundred eighteen thousand, thirty-nine".