449257817 has 2 divisors, whose sum is σ = 449257818. Its totient is φ = 449257816.

The previous prime is 449257813. The next prime is 449257891. The reversal of 449257817 is 718752944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 334853401 + 114404416 = 18299^2 + 10696^2 .

It is a cyclic number.

It is not a de Polignac number, because 449257817 - 2² = 449257813 is a prime.

It is a super-2 number, since 2×449257817² = 403665172271210978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (449257813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224628908 + 224628909.

It is an arithmetic number, because the mean of its divisors is an integer number (224628909).

Almost surely, 2^449257817 is an apocalyptic number.

It is an amenable number.

449257817 is a deficient number, since it is larger than the sum of its proper divisors (1).

449257817 is an equidigital number, since it uses as much as digits as its factorization.

449257817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The square root of 449257817 is about 21195.7027956140. The cubic root of 449257817 is about 765.8879103234.

The spelling of 449257817 in words is "four hundred forty-nine million, two hundred fifty-seven thousand, eight hundred seventeen".