808749493 has 2 divisors, whose sum is σ = 808749494. Its totient is φ = 808749492.

The previous prime is 808749479. The next prime is 808749499. The reversal of 808749493 is 394947808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 640191204 + 168558289 = 25302^2 + 12983^2 .

It is a cyclic number.

It is not a de Polignac number, because 808749493 - 2⁹ = 808748981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 808749493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808749499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404374746 + 404374747.

It is an arithmetic number, because the mean of its divisors is an integer number (404374747).

Almost surely, 2^808749493 is an apocalyptic number.

It is an amenable number.

808749493 is a deficient number, since it is larger than the sum of its proper divisors (1).

808749493 is an equidigital number, since it uses as much as digits as its factorization.

808749493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 808749493 is about 28438.5212871556. The cubic root of 808749493 is about 931.6897990330.

The spelling of 808749493 in words is "eight hundred eight million, seven hundred forty-nine thousand, four hundred ninety-three".