809321315401 has 2 divisors, whose sum is σ = 809321315402. Its totient is φ = 809321315400.

The previous prime is 809321315347. The next prime is 809321315483. The reversal of 809321315401 is 104513123908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 758301348025 + 51019967376 = 870805^2 + 225876^2 .

It is a cyclic number.

It is not a de Polignac number, because 809321315401 - 2⁷ = 809321315273 is a prime.

It is not a weakly prime, because it can be changed into another prime (809321325401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404660657700 + 404660657701.

It is an arithmetic number, because the mean of its divisors is an integer number (404660657701).

Almost surely, 2^809321315401 is an apocalyptic number.

It is an amenable number.

809321315401 is a deficient number, since it is larger than the sum of its proper divisors (1).

809321315401 is an equidigital number, since it uses as much as digits as its factorization.

809321315401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 809321315401 in words is "eight hundred nine billion, three hundred twenty-one million, three hundred fifteen thousand, four hundred one".