8487344906891 has 2 divisors, whose sum is σ = 8487344906892. Its totient is φ = 8487344906890.

The previous prime is 8487344906867. The next prime is 8487344906893. The reversal of 8487344906891 is 1986094437848.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8487344906891 - 2¹⁸ = 8487344644747 is a prime.

Together with 8487344906893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8487344906893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4243672453445 + 4243672453446.

It is an arithmetic number, because the mean of its divisors is an integer number (4243672453446).

Almost surely, 2^{8487344906891} is an apocalyptic number.

8487344906891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8487344906891 is an equidigital number, since it uses as much as digits as its factorization.

8487344906891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 334430208, while the sum is 71.

The spelling of 8487344906891 in words is "eight trillion, four hundred eighty-seven billion, three hundred forty-four million, nine hundred six thousand, eight hundred ninety-one".