806390321 has 16 divisors (see below), whose sum is σ = 932633088. Its totient is φ = 690249600.

The previous prime is 806390303. The next prime is 806390323. The reversal of 806390321 is 123093608.

It is a cyclic number.

It is not a de Polignac number, because 806390321 - 2²⁶ = 739281457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (806390323) 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, 19340 + ... + 44573.

It is an arithmetic number, because the mean of its divisors is an integer number (58289568).

Almost surely, 2^806390321 is an apocalyptic number.

It is an amenable number.

806390321 is a deficient number, since it is larger than the sum of its proper divisors (126242767).

806390321 is a wasteful number, since it uses less digits than its factorization.

806390321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63992.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 806390321 is about 28397.0125365328. The cubic root of 806390321 is about 930.7829845720.

The spelling of 806390321 in words is "eight hundred six million, three hundred ninety thousand, three hundred twenty-one".