449798509 has 2 divisors, whose sum is σ = 449798510. Its totient is φ = 449798508.

The previous prime is 449798467. The next prime is 449798513. The reversal of 449798509 is 905897944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404613225 + 45185284 = 20115^2 + 6722^2 .

It is a cyclic number.

It is not a de Polignac number, because 449798509 - 2¹¹ = 449796461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 449798509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449798519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224899254 + 224899255.

It is an arithmetic number, because the mean of its divisors is an integer number (224899255).

Almost surely, 2^449798509 is an apocalyptic number.

It is an amenable number.

449798509 is a deficient number, since it is larger than the sum of its proper divisors (1).

449798509 is an equidigital number, since it uses as much as digits as its factorization.

449798509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 449798509 is about 21208.4537154409. The cubic root of 449798509 is about 766.1950416492.

The spelling of 449798509 in words is "four hundred forty-nine million, seven hundred ninety-eight thousand, five hundred nine".