449680009 has 2 divisors, whose sum is σ = 449680010. Its totient is φ = 449680008.

The previous prime is 449679959. The next prime is 449680013. The reversal of 449680009 is 900086944.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416364025 + 33315984 = 20405^2 + 5772^2 .

It is a cyclic number.

It is not a de Polignac number, because 449680009 - 2²¹ = 447582857 is a prime.

It is a super-2 number, since 2×449680009² = 404424220988480162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (449680909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224840004 + 224840005.

It is an arithmetic number, because the mean of its divisors is an integer number (224840005).

Almost surely, 2^449680009 is an apocalyptic number.

It is an amenable number.

449680009 is a deficient number, since it is larger than the sum of its proper divisors (1).

449680009 is an equidigital number, since it uses as much as digits as its factorization.

449680009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 449680009 is about 21205.6598341103. The cubic root of 449680009 is about 766.1277507141.

The spelling of 449680009 in words is "four hundred forty-nine million, six hundred eighty thousand, nine".