8091913 has 2 divisors, whose sum is σ = 8091914. Its totient is φ = 8091912.

The previous prime is 8091907. The next prime is 8091931. The reversal of 8091913 is 3191908.

Together with next prime (8091931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5143824 + 2948089 = 2268^2 + 1717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8091913 is a prime.

It is not a weakly prime, because it can be changed into another prime (8091973) 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, 4045956 + 4045957.

It is an arithmetic number, because the mean of its divisors is an integer number (4045957).

Almost surely, 2^8091913 is an apocalyptic number.

It is an amenable number.

8091913 is a deficient number, since it is larger than the sum of its proper divisors (1).

8091913 is an equidigital number, since it uses as much as digits as its factorization.

8091913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 8091913 is about 2844.6287982793. The cubic root of 8091913 is about 200.7630269143.

The spelling of 8091913 in words is "eight million, ninety-one thousand, nine hundred thirteen".