447997481 has 16 divisors (see below), whose sum is σ = 498785040. Its totient is φ = 400404480.

The previous prime is 447997477. The next prime is 447997489. The reversal of 447997481 is 184799744.

It can be written as a sum of positive squares in 8 ways, for example, as 6325225 + 441672256 = 2515^2 + 21016^2 .

It is a cyclic number.

It is not a de Polignac number, because 447997481 - 2² = 447997477 is a prime.

It is a super-2 number, since 2×447997481² = 401403485964690722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (447997489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22625 + ... + 37521.

It is an arithmetic number, because the mean of its divisors is an integer number (31174065).

Almost surely, 2^447997481 is an apocalyptic number.

It is an amenable number.

447997481 is a deficient number, since it is larger than the sum of its proper divisors (50787559).

447997481 is a wasteful number, since it uses less digits than its factorization.

447997481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15004.

The product of its digits is 2032128, while the sum is 53.

The square root of 447997481 is about 21165.9509826514. The cubic root of 447997481 is about 765.1710389772.

The spelling of 447997481 in words is "four hundred forty-seven million, nine hundred ninety-seven thousand, four hundred eighty-one".