8168809 has 4 divisors (see below), whose sum is σ = 8911440. Its totient is φ = 7426180.

The previous prime is 8168801. The next prime is 8168819. The reversal of 8168809 is 9088618.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8168809 - 2³ = 8168801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8168801) 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 3 ways as a sum of consecutive naturals, for example, 371299 + ... + 371320.

It is an arithmetic number, because the mean of its divisors is an integer number (2227860).

Almost surely, 2^8168809 is an apocalyptic number.

It is an amenable number.

8168809 is a deficient number, since it is larger than the sum of its proper divisors (742631).

8168809 is a wasteful number, since it uses less digits than its factorization.

8168809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742630.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 8168809 is about 2858.1128389201. The cubic root of 8168809 is about 201.3969614422.

The spelling of 8168809 in words is "eight million, one hundred sixty-eight thousand, eight hundred nine".