449681863 has 2 divisors, whose sum is σ = 449681864. Its totient is φ = 449681862.

The previous prime is 449681861. The next prime is 449681887. The reversal of 449681863 is 368186944.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 449681863 - 2¹ = 449681861 is a prime.

It is a super-2 number, since 2×449681863² = 404427555822301538, which contains 22 as substring.

Together with 449681861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449681861) 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, 224840931 + 224840932.

It is an arithmetic number, because the mean of its divisors is an integer number (224840932).

Almost surely, 2^449681863 is an apocalyptic number.

449681863 is a deficient number, since it is larger than the sum of its proper divisors (1).

449681863 is an equidigital number, since it uses as much as digits as its factorization.

449681863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 49.

The square root of 449681863 is about 21205.7035488097. The cubic root of 449681863 is about 766.1288036101.

The spelling of 449681863 in words is "four hundred forty-nine million, six hundred eighty-one thousand, eight hundred sixty-three".