449681213 has 2 divisors, whose sum is σ = 449681214. Its totient is φ = 449681212.

The previous prime is 449681207. The next prime is 449681237. The reversal of 449681213 is 312186944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374112964 + 75568249 = 19342^2 + 8693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-449681213 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449681273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224840606 + 224840607.

It is an arithmetic number, because the mean of its divisors is an integer number (224840607).

Almost surely, 2^449681213 is an apocalyptic number.

It is an amenable number.

449681213 is a deficient number, since it is larger than the sum of its proper divisors (1).

449681213 is an equidigital number, since it uses as much as digits as its factorization.

449681213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 449681213 is about 21205.6882227387. The cubic root of 449681213 is about 766.1284344721.

The spelling of 449681213 in words is "four hundred forty-nine million, six hundred eighty-one thousand, two hundred thirteen".