12805007329 has 4 divisors (see below), whose sum is σ = 12859964676. Its totient is φ = 12750049984.

The previous prime is 12805007287. The next prime is 12805007353. The reversal of 12805007329 is 92370050821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92370050821 = 107 ⋅863271503.

It can be written as a sum of positive squares in 2 ways, for example, as 8041246929 + 4763760400 = 89673^2 + 69020^2 .

It is a cyclic number.

It is not a de Polignac number, because 12805007329 - 2⁹ = 12805006817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12805007129) 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, 27478324 + ... + 27478789.

It is an arithmetic number, because the mean of its divisors is an integer number (3214991169).

Almost surely, 2^12805007329 is an apocalyptic number.

It is an amenable number.

12805007329 is a deficient number, since it is larger than the sum of its proper divisors (54957347).

12805007329 is an equidigital number, since it uses as much as digits as its factorization.

12805007329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54957346.

The product of its (nonzero) digits is 30240, while the sum is 37.

The spelling of 12805007329 in words is "twelve billion, eight hundred five million, seven thousand, three hundred twenty-nine".