809994253 has 2 divisors, whose sum is σ = 809994254. Its totient is φ = 809994252.

The previous prime is 809994217. The next prime is 809994271. The reversal of 809994253 is 352499908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 662444644 + 147549609 = 25738^2 + 12147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-809994253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 809994197 and 809994206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809994953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404997126 + 404997127.

It is an arithmetic number, because the mean of its divisors is an integer number (404997127).

Almost surely, 2^809994253 is an apocalyptic number.

It is an amenable number.

809994253 is a deficient number, since it is larger than the sum of its proper divisors (1).

809994253 is an equidigital number, since it uses as much as digits as its factorization.

809994253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 809994253 is about 28460.3979768379. The cubic root of 809994253 is about 932.1675471803.

The spelling of 809994253 in words is "eight hundred nine million, nine hundred ninety-four thousand, two hundred fifty-three".