7947947 has 12 divisors (see below), whose sum is σ = 9733320. Its totient is φ = 6453216.

The previous prime is 7947941. The next prime is 7947971. The reversal of 7947947 is 7497497.

It is not a de Polignac number, because 7947947 - 2⁴ = 7947931 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (7947941) 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 11 ways as a sum of consecutive naturals, for example, 3338 + ... + 5199.

It is an arithmetic number, because the mean of its divisors is an integer number (811110).

Almost surely, 2^7947947 is an apocalyptic number.

7947947 is a deficient number, since it is larger than the sum of its proper divisors (1785373).

7947947 is a wasteful number, since it uses less digits than its factorization.

7947947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570 (or 8563 counting only the distinct ones).

The product of its digits is 444528, while the sum is 47.

The square root of 7947947 is about 2819.2103504350. The cubic root of 7947947 is about 199.5652807806.

The spelling of 7947947 in words is "seven million, nine hundred forty-seven thousand, nine hundred forty-seven".