8191845 has 12 divisors (see below), whose sum is σ = 14199276. Its totient is φ = 4368960.

The previous prime is 8191829. The next prime is 8191847. The reversal of 8191845 is 5481918.

It can be written as a sum of positive squares in 2 ways, for example, as 2169729 + 6022116 = 1473^2 + 2454^2 .

It is not a de Polignac number, because 8191845 - 2⁴ = 8191829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8191847) 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 in 11 ways as a sum of consecutive naturals, for example, 90976 + ... + 91065.

It is an arithmetic number, because the mean of its divisors is an integer number (1183273).

Almost surely, 2^8191845 is an apocalyptic number.

It is an amenable number.

8191845 is a deficient number, since it is larger than the sum of its proper divisors (6007431).

8191845 is a wasteful number, since it uses less digits than its factorization.

8191845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182052 (or 182049 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 8191845 is about 2862.1399336860. The cubic root of 8191845 is about 201.5860965705.

The spelling of 8191845 in words is "eight million, one hundred ninety-one thousand, eight hundred forty-five".