8146783891 has 2 divisors, whose sum is σ = 8146783892. Its totient is φ = 8146783890.

The previous prime is 8146783871. The next prime is 8146783951. The reversal of 8146783891 is 1983876418.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8146783891 - 2²⁹ = 7609912979 is a prime.

It is not a weakly prime, because it can be changed into another prime (8146783831) 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 as a sum of consecutive naturals, namely, 4073391945 + 4073391946.

It is an arithmetic number, because the mean of its divisors is an integer number (4073391946).

Almost surely, 2^8146783891 is an apocalyptic number.

8146783891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8146783891 is an equidigital number, since it uses as much as digits as its factorization.

8146783891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 55.

The square root of 8146783891 is about 90259.5362884166. The cubic root of 8146783891 is about 2012.1579334826.

The spelling of 8146783891 in words is "eight billion, one hundred forty-six million, seven hundred eighty-three thousand, eight hundred ninety-one".