447145729 has 2 divisors, whose sum is σ = 447145730. Its totient is φ = 447145728.

The previous prime is 447145711. The next prime is 447145793. The reversal of 447145729 is 927541744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290770704 + 156375025 = 17052^2 + 12505^2 .

It is a cyclic number.

It is not a de Polignac number, because 447145729 - 2⁹ = 447145217 is a prime.

It is not a weakly prime, because it can be changed into another prime (447145429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223572864 + 223572865.

It is an arithmetic number, because the mean of its divisors is an integer number (223572865).

Almost surely, 2^447145729 is an apocalyptic number.

It is an amenable number.

447145729 is a deficient number, since it is larger than the sum of its proper divisors (1).

447145729 is an equidigital number, since it uses as much as digits as its factorization.

447145729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 43.

The square root of 447145729 is about 21145.8206036086. The cubic root of 447145729 is about 764.6858060139.

The spelling of 447145729 in words is "four hundred forty-seven million, one hundred forty-five thousand, seven hundred twenty-nine".