8484640447 has 2 divisors, whose sum is σ = 8484640448. Its totient is φ = 8484640446.

The previous prime is 8484640429. The next prime is 8484640469. The reversal of 8484640447 is 7440464848.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8484640447 - 2⁷ = 8484640319 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8484640447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8484640147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4242320223 + 4242320224.

It is an arithmetic number, because the mean of its divisors is an integer number (4242320224).

Almost surely, 2^8484640447 is an apocalyptic number.

8484640447 is a deficient number, since it is larger than the sum of its proper divisors (1).

8484640447 is an equidigital number, since it uses as much as digits as its factorization.

8484640447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2752512, while the sum is 49.

The square root of 8484640447 is about 92112.1080368917. The cubic root of 8484640447 is about 2039.5975470828.

The spelling of 8484640447 in words is "eight billion, four hundred eighty-four million, six hundred forty thousand, four hundred forty-seven".