12387005867 has 4 divisors (see below), whose sum is σ = 12391625400. Its totient is φ = 12382386336.

The previous prime is 12387005861. The next prime is 12387005887. The reversal of 12387005867 is 76850078321.

It is a happy number.

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 12387005867 - 2²² = 12382811563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12387005861) 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, 2305742 + ... + 2311107.

It is an arithmetic number, because the mean of its divisors is an integer number (3097906350).

Almost surely, 2^12387005867 is an apocalyptic number.

12387005867 is a deficient number, since it is larger than the sum of its proper divisors (4619533).

12387005867 is an equidigital number, since it uses as much as digits as its factorization.

12387005867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4619532.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 12387005867 in words is "twelve billion, three hundred eighty-seven million, five thousand, eight hundred sixty-seven".