449423609 has 2 divisors, whose sum is σ = 449423610. Its totient is φ = 449423608.

The previous prime is 449423581. The next prime is 449423627. The reversal of 449423609 is 906324944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234947584 + 214476025 = 15328^2 + 14645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-449423609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (449423699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224711804 + 224711805.

It is an arithmetic number, because the mean of its divisors is an integer number (224711805).

Almost surely, 2^449423609 is an apocalyptic number.

It is an amenable number.

449423609 is a deficient number, since it is larger than the sum of its proper divisors (1).

449423609 is an equidigital number, since it uses as much as digits as its factorization.

449423609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 449423609 is about 21199.6134162866. The cubic root of 449423609 is about 765.9821119652.

The spelling of 449423609 in words is "four hundred forty-nine million, four hundred twenty-three thousand, six hundred nine".