12784372993 has 4 divisors (see below), whose sum is σ = 14610712000. Its totient is φ = 10958033988.

The previous prime is 12784372943. The next prime is 12784373009. The reversal of 12784372993 is 39927348721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12784372993 - 2⁹ = 12784372481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12784372943) 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, 913169493 + ... + 913169506.

It is an arithmetic number, because the mean of its divisors is an integer number (3652678000).

Almost surely, 2^12784372993 is an apocalyptic number.

It is an amenable number.

12784372993 is a deficient number, since it is larger than the sum of its proper divisors (1826339007).

12784372993 is an equidigital number, since it uses as much as digits as its factorization.

12784372993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826339006.

The product of its digits is 4572288, while the sum is 55.

The spelling of 12784372993 in words is "twelve billion, seven hundred eighty-four million, three hundred seventy-two thousand, nine hundred ninety-three".