7868009 has 6 divisors (see below), whose sum is σ = 8022126. Its totient is φ = 7716800.

The previous prime is 7867999. The next prime is 7868027. The reversal of 7868009 is 9008687.

It can be written as a sum of positive squares in 3 ways, for example, as 2706025 + 5161984 = 1645^2 + 2272^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7868009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7868089) 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 5 ways as a sum of consecutive naturals, for example, 1409 + ... + 4209.

It is an arithmetic number, because the mean of its divisors is an integer number (1337021).

Almost surely, 2^7868009 is an apocalyptic number.

It is an amenable number.

7868009 is a deficient number, since it is larger than the sum of its proper divisors (154117).

7868009 is an equidigital number, since it uses as much as digits as its factorization.

7868009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2907 (or 2854 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 7868009 is about 2804.9971479486. The cubic root of 7868009 is about 198.8939697606.

The spelling of 7868009 in words is "seven million, eight hundred sixty-eight thousand, nine".