8199945 has 48 divisors (see below), whose sum is σ = 15567552. Its totient is φ = 3968640.

The previous prime is 8199943. The next prime is 8199979. The reversal of 8199945 is 5499918.

8199945 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8199945 - 2¹ = 8199943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8199945.

It is not an unprimeable number, because it can be changed into a prime (8199941) 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 in 47 ways as a sum of consecutive naturals, for example, 62530 + ... + 62660.

It is an arithmetic number, because the mean of its divisors is an integer number (324324).

Almost surely, 2^8199945 is an apocalyptic number.

It is an amenable number.

8199945 is a deficient number, since it is larger than the sum of its proper divisors (7367607).

8199945 is a wasteful number, since it uses less digits than its factorization.

8199945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 259 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 8199945 is about 2863.5546092226. The cubic root of 8199945 is about 201.6525166707.

The spelling of 8199945 in words is "eight million, one hundred ninety-nine thousand, nine hundred forty-five".