8478426191 has 2 divisors, whose sum is σ = 8478426192. Its totient is φ = 8478426190.

The previous prime is 8478426137. The next prime is 8478426193. The reversal of 8478426191 is 1916248748.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8478426191 is a prime.

Together with 8478426193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8478426193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4239213095 + 4239213096.

It is an arithmetic number, because the mean of its divisors is an integer number (4239213096).

Almost surely, 2^8478426191 is an apocalyptic number.

8478426191 is a deficient number, since it is larger than the sum of its proper divisors (1).

8478426191 is an equidigital number, since it uses as much as digits as its factorization.

8478426191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 50.

The square root of 8478426191 is about 92078.3698324422. The cubic root of 8478426191 is about 2039.0994832786.

The spelling of 8478426191 in words is "eight billion, four hundred seventy-eight million, four hundred twenty-six thousand, one hundred ninety-one".