12487691747 has 4 divisors (see below), whose sum is σ = 12498753720. Its totient is φ = 12476629776.

The previous prime is 12487691729. The next prime is 12487691759. The reversal of 12487691747 is 74719678421.

12487691747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12487691747 - 2²⁴ = 12470914531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12487691692 and 12487691701.

It is not an unprimeable number, because it can be changed into a prime (12487691707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5529293 + ... + 5531550.

It is an arithmetic number, because the mean of its divisors is an integer number (3124688430).

Almost surely, 2^12487691747 is an apocalyptic number.

12487691747 is a deficient number, since it is larger than the sum of its proper divisors (11061973).

12487691747 is a wasteful number, since it uses less digits than its factorization.

12487691747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11061972.

The product of its digits is 4741632, while the sum is 56.

The spelling of 12487691747 in words is "twelve billion, four hundred eighty-seven million, six hundred ninety-one thousand, seven hundred forty-seven".