808421749 has 2 divisors, whose sum is σ = 808421750. Its totient is φ = 808421748.

The previous prime is 808421737. The next prime is 808421767. The reversal of 808421749 is 947124808.

808421749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 806957649 + 1464100 = 28407^2 + 1210^2 .

It is a cyclic number.

It is not a de Polignac number, because 808421749 - 2¹¹ = 808419701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808421729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404210874 + 404210875.

It is an arithmetic number, because the mean of its divisors is an integer number (404210875).

Almost surely, 2^808421749 is an apocalyptic number.

It is an amenable number.

808421749 is a deficient number, since it is larger than the sum of its proper divisors (1).

808421749 is an equidigital number, since it uses as much as digits as its factorization.

808421749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 808421749 is about 28432.7583783213. The cubic root of 808421749 is about 931.5639269298.

The spelling of 808421749 in words is "eight hundred eight million, four hundred twenty-one thousand, seven hundred forty-nine".