8719391 has 2 divisors, whose sum is σ = 8719392. Its totient is φ = 8719390.

The previous prime is 8719379. The next prime is 8719421. The reversal of 8719391 is 1939178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8719391 - 2⁶ = 8719327 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8719301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4359695 + 4359696.

It is an arithmetic number, because the mean of its divisors is an integer number (4359696).

Almost surely, 2^8719391 is an apocalyptic number.

8719391 is a deficient number, since it is larger than the sum of its proper divisors (1).

8719391 is an equidigital number, since it uses as much as digits as its factorization.

8719391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 38.

The square root of 8719391 is about 2952.8614935347. The cubic root of 8719391 is about 205.8237015532.

The spelling of 8719391 in words is "eight million, seven hundred nineteen thousand, three hundred ninety-one".