447605681 has 2 divisors, whose sum is σ = 447605682. Its totient is φ = 447605680.

The previous prime is 447605677. The next prime is 447605689. The reversal of 447605681 is 186506744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376709281 + 70896400 = 19409^2 + 8420^2 .

It is a cyclic number.

It is not a de Polignac number, because 447605681 - 2² = 447605677 is a prime.

It is a super-2 number, since 2×447605681² = 400701691326947522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (447605689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223802840 + 223802841.

It is an arithmetic number, because the mean of its divisors is an integer number (223802841).

Almost surely, 2^447605681 is an apocalyptic number.

It is an amenable number.

447605681 is a deficient number, since it is larger than the sum of its proper divisors (1).

447605681 is an equidigital number, since it uses as much as digits as its factorization.

447605681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 447605681 is about 21156.6935271086. The cubic root of 447605681 is about 764.9479116427.

The spelling of 447605681 in words is "four hundred forty-seven million, six hundred five thousand, six hundred eighty-one".