449140009 has 2 divisors, whose sum is σ = 449140010. Its totient is φ = 449140008.

The previous prime is 449140007. The next prime is 449140039. The reversal of 449140009 is 900041944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405619600 + 43520409 = 20140^2 + 6597^2 .

It is a cyclic number.

It is not a de Polignac number, because 449140009 - 2¹ = 449140007 is a prime.

Together with 449140007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (449140007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224570004 + 224570005.

It is an arithmetic number, because the mean of its divisors is an integer number (224570005).

Almost surely, 2^449140009 is an apocalyptic number.

It is an amenable number.

449140009 is a deficient number, since it is larger than the sum of its proper divisors (1).

449140009 is an equidigital number, since it uses as much as digits as its factorization.

449140009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 449140009 is about 21192.9235595281. The cubic root of 449140009 is about 765.8209587072.

The spelling of 449140009 in words is "four hundred forty-nine million, one hundred forty thousand, nine".