7947849 has 24 divisors (see below), whose sum is σ = 13278720. Its totient is φ = 4191264.

The previous prime is 7947839. The next prime is 7947851. The reversal of 7947849 is 9487497.

It is a happy number.

It is not a de Polignac number, because 7947849 - 2⁹ = 7947337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7947798 and 7947807.

It is not an unprimeable number, because it can be changed into a prime (7947839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169 + ... + 3990.

It is an arithmetic number, because the mean of its divisors is an integer number (553280).

Almost surely, 2^7947849 is an apocalyptic number.

It is an amenable number.

7947849 is a deficient number, since it is larger than the sum of its proper divisors (5330871).

7947849 is a wasteful number, since it uses less digits than its factorization.

7947849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4189 (or 4182 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 7947849 is about 2819.1929696280. The cubic root of 7947849 is about 199.5644605488.

The spelling of 7947849 in words is "seven million, nine hundred forty-seven thousand, eight hundred forty-nine".