12143894467 has 2 divisors, whose sum is σ = 12143894468. Its totient is φ = 12143894466.

The previous prime is 12143894459. The next prime is 12143894489. The reversal of 12143894467 is 76449834121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12143894467 - 2³ = 12143894459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12143894467.

It is not a weakly prime, because it can be changed into another prime (12143874467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6071947233 + 6071947234.

It is an arithmetic number, because the mean of its divisors is an integer number (6071947234).

Almost surely, 2^12143894467 is an apocalyptic number.

12143894467 is a deficient number, since it is larger than the sum of its proper divisors (1).

12143894467 is an equidigital number, since it uses as much as digits as its factorization.

12143894467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The spelling of 12143894467 in words is "twelve billion, one hundred forty-three million, eight hundred ninety-four thousand, four hundred sixty-seven".