447772081 has 2 divisors, whose sum is σ = 447772082. Its totient is φ = 447772080.

The previous prime is 447772067. The next prime is 447772097. The reversal of 447772081 is 180277744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411278400 + 36493681 = 20280^2 + 6041^2 .

It is a cyclic number.

It is not a de Polignac number, because 447772081 - 2⁵ = 447772049 is a prime.

It is a super-2 number, since 2×447772081² = 400999673046141122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (447772051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223886040 + 223886041.

It is an arithmetic number, because the mean of its divisors is an integer number (223886041).

Almost surely, 2^447772081 is an apocalyptic number.

It is an amenable number.

447772081 is a deficient number, since it is larger than the sum of its proper divisors (1).

447772081 is an equidigital number, since it uses as much as digits as its factorization.

447772081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87808, while the sum is 40.

The square root of 447772081 is about 21160.6257232625. The cubic root of 447772081 is about 765.0426911685.

The spelling of 447772081 in words is "four hundred forty-seven million, seven hundred seventy-two thousand, eighty-one".