449942309 has 2 divisors, whose sum is σ = 449942310. Its totient is φ = 449942308.

The previous prime is 449942293. The next prime is 449942341. The reversal of 449942309 is 903249944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298529284 + 151413025 = 17278^2 + 12305^2 .

It is a cyclic number.

It is not a de Polignac number, because 449942309 - 2⁴ = 449942293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 449942309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449942359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224971154 + 224971155.

It is an arithmetic number, because the mean of its divisors is an integer number (224971155).

Almost surely, 2^449942309 is an apocalyptic number.

It is an amenable number.

449942309 is a deficient number, since it is larger than the sum of its proper divisors (1).

449942309 is an equidigital number, since it uses as much as digits as its factorization.

449942309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 449942309 is about 21211.8436021012. The cubic root of 449942309 is about 766.2766834700.

The spelling of 449942309 in words is "four hundred forty-nine million, nine hundred forty-two thousand, three hundred nine".