8408891 has 2 divisors, whose sum is σ = 8408892. Its totient is φ = 8408890.

The previous prime is 8408867. The next prime is 8408893. The reversal of 8408891 is 1988048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8408891 - 2¹⁴ = 8392507 is a prime.

Together with 8408893, 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 (8408893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4204445 + 4204446.

It is an arithmetic number, because the mean of its divisors is an integer number (4204446).

Almost surely, 2^8408891 is an apocalyptic number.

8408891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8408891 is an equidigital number, since it uses as much as digits as its factorization.

8408891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 8408891 is about 2899.8087867996. The cubic root of 8408891 is about 203.3509665499.

The spelling of 8408891 in words is "eight million, four hundred eight thousand, eight hundred ninety-one".