447820889533 has 2 divisors, whose sum is σ = 447820889534. Its totient is φ = 447820889532.

The previous prime is 447820889521. The next prime is 447820889567. The reversal of 447820889533 is 335988028744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245592598329 + 202228291204 = 495573^2 + 449698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447820889533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447820889333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223910444766 + 223910444767.

It is an arithmetic number, because the mean of its divisors is an integer number (223910444767).

Almost surely, 2^447820889533 is an apocalyptic number.

It is an amenable number.

447820889533 is a deficient number, since it is larger than the sum of its proper divisors (1).

447820889533 is an equidigital number, since it uses as much as digits as its factorization.

447820889533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46448640, while the sum is 61.

The spelling of 447820889533 in words is "four hundred forty-seven billion, eight hundred twenty million, eight hundred eighty-nine thousand, five hundred thirty-three".