805168309 has 16 divisors (see below), whose sum is σ = 891342144. Its totient is φ = 721206400.

The previous prime is 805168307. The next prime is 805168333. The reversal of 805168309 is 903861508.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 805168309 - 2¹ = 805168307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805168307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419937 + ... + 421849.

It is an arithmetic number, because the mean of its divisors is an integer number (55708884).

Almost surely, 2^805168309 is an apocalyptic number.

It is an amenable number.

805168309 is a deficient number, since it is larger than the sum of its proper divisors (86173835).

805168309 is a wasteful number, since it uses less digits than its factorization.

805168309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 805168309 is about 28375.4878195953. The cubic root of 805168309 is about 930.3125742394.

The spelling of 805168309 in words is "eight hundred five million, one hundred sixty-eight thousand, three hundred nine".