447138481 has 2 divisors, whose sum is σ = 447138482. Its totient is φ = 447138480.

The previous prime is 447138409. The next prime is 447138529. The reversal of 447138481 is 184831744.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277722225 + 169416256 = 16665^2 + 13016^2 .

It is a cyclic number.

It is not a de Polignac number, because 447138481 - 2⁷ = 447138353 is a prime.

It is a super-2 number, since 2×447138481² = 399865642381974722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (447138781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223569240 + 223569241.

It is an arithmetic number, because the mean of its divisors is an integer number (223569241).

Almost surely, 2^447138481 is an apocalyptic number.

It is an amenable number.

447138481 is a deficient number, since it is larger than the sum of its proper divisors (1).

447138481 is an equidigital number, since it uses as much as digits as its factorization.

447138481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 40.

The square root of 447138481 is about 21145.6492215302. The cubic root of 447138481 is about 764.6816742717.

The spelling of 447138481 in words is "four hundred forty-seven million, one hundred thirty-eight thousand, four hundred eighty-one".