8005391 has 2 divisors, whose sum is σ = 8005392. Its totient is φ = 8005390.

The previous prime is 8005379. The next prime is 8005397. The reversal of 8005391 is 1935008.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8005391 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8005391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8005397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4002695 + 4002696.

It is an arithmetic number, because the mean of its divisors is an integer number (4002696).

Almost surely, 2^8005391 is an apocalyptic number.

8005391 is a deficient number, since it is larger than the sum of its proper divisors (1).

8005391 is an equidigital number, since it uses as much as digits as its factorization.

8005391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 8005391 is about 2829.3799674134. The cubic root of 8005391 is about 200.0449149125.

The spelling of 8005391 in words is "eight million, five thousand, three hundred ninety-one".