12731779367 has 4 divisors (see below), whose sum is σ = 12748598856. Its totient is φ = 12714959880.

The previous prime is 12731779343. The next prime is 12731779387. The reversal of 12731779367 is 76397713721.

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 12731779367 - 2¹⁸ = 12731517223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731779387) 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, 8408609 + ... + 8410122.

It is an arithmetic number, because the mean of its divisors is an integer number (3187149714).

Almost surely, 2^12731779367 is an apocalyptic number.

12731779367 is a deficient number, since it is larger than the sum of its proper divisors (16819489).

12731779367 is an equidigital number, since it uses as much as digits as its factorization.

12731779367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16819488.

The product of its digits is 2333772, while the sum is 53.

The spelling of 12731779367 in words is "twelve billion, seven hundred thirty-one million, seven hundred seventy-nine thousand, three hundred sixty-seven".