449664217 has 2 divisors, whose sum is σ = 449664218. Its totient is φ = 449664216.

The previous prime is 449664167. The next prime is 449664239. The reversal of 449664217 is 712466944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246772681 + 202891536 = 15709^2 + 14244^2 .

It is a cyclic number.

It is not a de Polignac number, because 449664217 - 2¹⁵ = 449631449 is a prime.

It is not a weakly prime, because it can be changed into another prime (449664617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224832108 + 224832109.

It is an arithmetic number, because the mean of its divisors is an integer number (224832109).

Almost surely, 2^449664217 is an apocalyptic number.

It is an amenable number.

449664217 is a deficient number, since it is larger than the sum of its proper divisors (1).

449664217 is an equidigital number, since it uses as much as digits as its factorization.

449664217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 449664217 is about 21205.2874774194. The cubic root of 449664217 is about 766.1187822396.

The spelling of 449664217 in words is "four hundred forty-nine million, six hundred sixty-four thousand, two hundred seventeen".