806306309 has 4 divisors (see below), whose sum is σ = 810528000. Its totient is φ = 802084620.

The previous prime is 806306279. The next prime is 806306321. The reversal of 806306309 is 903603608.

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 806306309 - 2¹² = 806302213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806306509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2110559 + ... + 2110940.

It is an arithmetic number, because the mean of its divisors is an integer number (202632000).

Almost surely, 2^806306309 is an apocalyptic number.

It is an amenable number.

806306309 is a deficient number, since it is larger than the sum of its proper divisors (4221691).

806306309 is a wasteful number, since it uses less digits than its factorization.

806306309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221690.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 806306309 is about 28395.5332578911. The cubic root of 806306309 is about 930.7506595909.

The spelling of 806306309 in words is "eight hundred six million, three hundred six thousand, three hundred nine".