12396787679 has 4 divisors (see below), whose sum is σ = 12399649080. Its totient is φ = 12393926280.

The previous prime is 12396787639. The next prime is 12396787681. The reversal of 12396787679 is 97678769321.

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 12396787679 - 2¹² = 12396783583 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 (12396787639) 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, 1424192 + ... + 1432869.

It is an arithmetic number, because the mean of its divisors is an integer number (3099912270).

Almost surely, 2^12396787679 is an apocalyptic number.

12396787679 is a deficient number, since it is larger than the sum of its proper divisors (2861401).

12396787679 is an equidigital number, since it uses as much as digits as its factorization.

12396787679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2861400.

The product of its digits is 48009024, while the sum is 65.

The spelling of 12396787679 in words is "twelve billion, three hundred ninety-six million, seven hundred eighty-seven thousand, six hundred seventy-nine".