447727561 has 2 divisors, whose sum is σ = 447727562. Its totient is φ = 447727560.

The previous prime is 447727559. The next prime is 447727597. The reversal of 447727561 is 165727744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 293471161 + 154256400 = 17131^2 + 12420^2 .

It is a cyclic number.

It is not a de Polignac number, because 447727561 - 2¹ = 447727559 is a prime.

Together with 447727559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (447727531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223863780 + 223863781.

It is an arithmetic number, because the mean of its divisors is an integer number (223863781).

Almost surely, 2^447727561 is an apocalyptic number.

It is an amenable number.

447727561 is a deficient number, since it is larger than the sum of its proper divisors (1).

447727561 is an equidigital number, since it uses as much as digits as its factorization.

447727561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 329280, while the sum is 43.

The square root of 447727561 is about 21159.5737433437. The cubic root of 447727561 is about 765.0173353897.

The spelling of 447727561 in words is "four hundred forty-seven million, seven hundred twenty-seven thousand, five hundred sixty-one".