1449645209 has 2 divisors, whose sum is σ = 1449645210. Its totient is φ = 1449645208.

The previous prime is 1449645191. The next prime is 1449645257. The reversal of 1449645209 is 9025469441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 975625225 + 474019984 = 31235^2 + 21772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1449645209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1449645209.

It is not a weakly prime, because it can be changed into another prime (1419645209) 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, 724822604 + 724822605.

It is an arithmetic number, because the mean of its divisors is an integer number (724822605).

Almost surely, 2^1449645209 is an apocalyptic number.

It is an amenable number.

1449645209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1449645209 is an equidigital number, since it uses as much as digits as its factorization.

1449645209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 1449645209 is about 38074.2066102499. The cubic root of 1449645209 is about 1131.7588733481.

The spelling of 1449645209 in words is "one billion, four hundred forty-nine million, six hundred forty-five thousand, two hundred nine".