449809013 has 2 divisors, whose sum is σ = 449809014. Its totient is φ = 449809012.

The previous prime is 449809007. The next prime is 449809027. The reversal of 449809013 is 310908944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315666289 + 134142724 = 17767^2 + 11582^2 .

It is a cyclic number.

It is not a de Polignac number, because 449809013 - 2⁸ = 449808757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (449809093) 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, 224904506 + 224904507.

It is an arithmetic number, because the mean of its divisors is an integer number (224904507).

Almost surely, 2^449809013 is an apocalyptic number.

It is an amenable number.

449809013 is a deficient number, since it is larger than the sum of its proper divisors (1).

449809013 is an equidigital number, since it uses as much as digits as its factorization.

449809013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 449809013 is about 21208.7013510964. The cubic root of 449809013 is about 766.2010058383.

The spelling of 449809013 in words is "four hundred forty-nine million, eight hundred nine thousand, thirteen".