447449913 has 10 divisors (see below), whose sum is σ = 668412954. Its totient is φ = 298299888.

The previous prime is 447449887. The next prime is 447449927. The reversal of 447449913 is 319944744.

It can be written as a sum of positive squares in only one way, i.e., 440496144 + 6953769 = 20988^2 + 2637^2 .

It is not a de Polignac number, because 447449913 - 2⁸ = 447449657 is a prime.

It is a super-2 number, since 2×447449913² = 400422849287415138, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (447449963) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2761956 + ... + 2762117.

Almost surely, 2^447449913 is an apocalyptic number.

It is an amenable number.

447449913 is a deficient number, since it is larger than the sum of its proper divisors (220963041).

447449913 is an equidigital number, since it uses as much as digits as its factorization.

447449913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5524085 (or 5524076 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 447449913 is about 21153.0119132004. The cubic root of 447449913 is about 764.8591666930.

The spelling of 447449913 in words is "four hundred forty-seven million, four hundred forty-nine thousand, nine hundred thirteen".