8319391 has 2 divisors, whose sum is σ = 8319392. Its totient is φ = 8319390.

The previous prime is 8319379. The next prime is 8319401. The reversal of 8319391 is 1939138.

8319391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8319391 - 2⁷ = 8319263 is a prime.

It is a super-2 number, since 2×8319391² = 138424533221762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8319331) 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, 4159695 + 4159696.

It is an arithmetic number, because the mean of its divisors is an integer number (4159696).

Almost surely, 2^8319391 is an apocalyptic number.

8319391 is a deficient number, since it is larger than the sum of its proper divisors (1).

8319391 is an equidigital number, since it uses as much as digits as its factorization.

8319391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 34.

The square root of 8319391 is about 2884.3354520582. The cubic root of 8319391 is about 202.6269366203.

The spelling of 8319391 in words is "eight million, three hundred nineteen thousand, three hundred ninety-one".