8484447991 has 2 divisors, whose sum is σ = 8484447992. Its totient is φ = 8484447990.

The previous prime is 8484447953. The next prime is 8484448013. The reversal of 8484447991 is 1997444848.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8484447991 - 2⁹ = 8484447479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8484457991) 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, 4242223995 + 4242223996.

It is an arithmetic number, because the mean of its divisors is an integer number (4242223996).

Almost surely, 2^8484447991 is an apocalyptic number.

8484447991 is a deficient number, since it is larger than the sum of its proper divisors (1).

8484447991 is an equidigital number, since it uses as much as digits as its factorization.

8484447991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9289728, while the sum is 58.

The square root of 8484447991 is about 92111.0633474611. The cubic root of 8484447991 is about 2039.5821256572.

The spelling of 8484447991 in words is "eight billion, four hundred eighty-four million, four hundred forty-seven thousand, nine hundred ninety-one".