8047945 has 4 divisors (see below), whose sum is σ = 9657540. Its totient is φ = 6438352.

The previous prime is 8047939. The next prime is 8047957. The reversal of 8047945 is 5497408.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5212089 + 2835856 = 2283^2 + 1684^2 .

It is a cyclic number.

It is not a de Polignac number, because 8047945 - 2¹¹ = 8045897 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 804790 + ... + 804799.

It is an arithmetic number, because the mean of its divisors is an integer number (2414385).

Almost surely, 2^8047945 is an apocalyptic number.

It is an amenable number.

8047945 is a deficient number, since it is larger than the sum of its proper divisors (1609595).

8047945 is a wasteful number, since it uses less digits than its factorization.

8047945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609594.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 8047945 is about 2836.8900225423. The cubic root of 8047945 is about 200.3987461459.

The spelling of 8047945 in words is "eight million, forty-seven thousand, nine hundred forty-five".