809251349 has 2 divisors, whose sum is σ = 809251350. Its totient is φ = 809251348.

The previous prime is 809251307. The next prime is 809251367. The reversal of 809251349 is 943152908.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 590004100 + 219247249 = 24290^2 + 14807^2 .

It is a cyclic number.

It is not a de Polignac number, because 809251349 - 2¹² = 809247253 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809251369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404625674 + 404625675.

It is an arithmetic number, because the mean of its divisors is an integer number (404625675).

Almost surely, 2^809251349 is an apocalyptic number.

It is an amenable number.

809251349 is a deficient number, since it is larger than the sum of its proper divisors (1).

809251349 is an equidigital number, since it uses as much as digits as its factorization.

809251349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 809251349 is about 28447.3434436328. The cubic root of 809251349 is about 931.8824740364.

The spelling of 809251349 in words is "eight hundred nine million, two hundred fifty-one thousand, three hundred forty-nine".