447447985 has 4 divisors (see below), whose sum is σ = 536937588. Its totient is φ = 357958384.

The previous prime is 447447977. The next prime is 447447997. The reversal of 447447985 is 589744744.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124634896 + 322813089 = 11164^2 + 17967^2 .

It is a cyclic number.

It is not a de Polignac number, because 447447985 - 2³ = 447447977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44744794 + ... + 44744803.

It is an arithmetic number, because the mean of its divisors is an integer number (134234397).

Almost surely, 2^447447985 is an apocalyptic number.

It is an amenable number.

447447985 is a deficient number, since it is larger than the sum of its proper divisors (89489603).

447447985 is an equidigital number, since it uses as much as digits as its factorization.

447447985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89489602.

The product of its digits is 4515840, while the sum is 52.

The square root of 447447985 is about 21152.9663404450. The cubic root of 447447985 is about 764.8580681338.

The spelling of 447447985 in words is "four hundred forty-seven million, four hundred forty-seven thousand, nine hundred eighty-five".