8378341891 has 2 divisors, whose sum is σ = 8378341892. Its totient is φ = 8378341890.

The previous prime is 8378341879. The next prime is 8378341921. The reversal of 8378341891 is 1981438738.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8378341891 - 2⁹ = 8378341379 is a prime.

It is a super-2 number, since 2×8378341891² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8378341861) 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, 4189170945 + 4189170946.

It is an arithmetic number, because the mean of its divisors is an integer number (4189170946).

Almost surely, 2^8378341891 is an apocalyptic number.

8378341891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8378341891 is an equidigital number, since it uses as much as digits as its factorization.

8378341891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 52.

The square root of 8378341891 is about 91533.2829685465. The cubic root of 8378341891 is about 2031.0441287513.

The spelling of 8378341891 in words is "eight billion, three hundred seventy-eight million, three hundred forty-one thousand, eight hundred ninety-one".