8316991 has 2 divisors, whose sum is σ = 8316992. Its totient is φ = 8316990.

The previous prime is 8316989. The next prime is 8317009. The reversal of 8316991 is 1996138.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8316991 - 2¹ = 8316989 is a prime.

Together with 8316989, it forms a pair of twin primes.

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 8316991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8316491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4158495 + 4158496.

It is an arithmetic number, because the mean of its divisors is an integer number (4158496).

Almost surely, 2^8316991 is an apocalyptic number.

8316991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8316991 is an equidigital number, since it uses as much as digits as its factorization.

8316991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 37.

The square root of 8316991 is about 2883.9193816749. The cubic root of 8316991 is about 202.6074499609.

The spelling of 8316991 in words is "eight million, three hundred sixteen thousand, nine hundred ninety-one".