447640517 has 2 divisors, whose sum is σ = 447640518. Its totient is φ = 447640516.

The previous prime is 447640511. The next prime is 447640561. The reversal of 447640517 is 715046744.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242549476 + 205091041 = 15574^2 + 14321^2 .

It is a cyclic number.

It is not a de Polignac number, because 447640517 - 2⁸ = 447640261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447640511) 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, 223820258 + 223820259.

It is an arithmetic number, because the mean of its divisors is an integer number (223820259).

Almost surely, 2^447640517 is an apocalyptic number.

It is an amenable number.

447640517 is a deficient number, since it is larger than the sum of its proper divisors (1).

447640517 is an equidigital number, since it uses as much as digits as its factorization.

447640517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 447640517 is about 21157.5167966375. The cubic root of 447640517 is about 764.9677557714.

The spelling of 447640517 in words is "four hundred forty-seven million, six hundred forty thousand, five hundred seventeen".