12812743387 has 4 divisors (see below), whose sum is σ = 12848433840. Its totient is φ = 12777052936.

The previous prime is 12812743381. The next prime is 12812743399. The reversal of 12812743387 is 78334721821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12812743387 - 2²³ = 12804354779 is a prime.

It is a super-2 number, since 2×12812743387² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12812743381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17844688 + ... + 17845405.

It is an arithmetic number, because the mean of its divisors is an integer number (3212108460).

Almost surely, 2^12812743387 is an apocalyptic number.

12812743387 is a deficient number, since it is larger than the sum of its proper divisors (35690453).

12812743387 is an equidigital number, since it uses as much as digits as its factorization.

12812743387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35690452.

The product of its digits is 451584, while the sum is 46.

The spelling of 12812743387 in words is "twelve billion, eight hundred twelve million, seven hundred forty-three thousand, three hundred eighty-seven".