447428281 has 2 divisors, whose sum is σ = 447428282. Its totient is φ = 447428280.

The previous prime is 447428263. The next prime is 447428291. The reversal of 447428281 is 182824744.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 429152656 + 18275625 = 20716^2 + 4275^2 .

It is a cyclic number.

It is not a de Polignac number, because 447428281 - 2⁵ = 447428249 is a prime.

It is a super-3 number, since 3×447428281³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (447428231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223714140 + 223714141.

It is an arithmetic number, because the mean of its divisors is an integer number (223714141).

Almost surely, 2^447428281 is an apocalyptic number.

It is an amenable number.

447428281 is a deficient number, since it is larger than the sum of its proper divisors (1).

447428281 is an equidigital number, since it uses as much as digits as its factorization.

447428281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 114688, while the sum is 40.

The square root of 447428281 is about 21152.5005850372. The cubic root of 447428281 is about 764.8468407695.

The spelling of 447428281 in words is "four hundred forty-seven million, four hundred twenty-eight thousand, two hundred eighty-one".