8947426447 has 2 divisors, whose sum is σ = 8947426448. Its totient is φ = 8947426446.

The previous prime is 8947426441. The next prime is 8947426483. The reversal of 8947426447 is 7446247498.

8947426447 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8947426447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8947426441) 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, 4473713223 + 4473713224.

It is an arithmetic number, because the mean of its divisors is an integer number (4473713224).

Almost surely, 2^8947426447 is an apocalyptic number.

8947426447 is a deficient number, since it is larger than the sum of its proper divisors (1).

8947426447 is an equidigital number, since it uses as much as digits as its factorization.

8947426447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10838016, while the sum is 55.

The square root of 8947426447 is about 94590.8370139518. The cubic root of 8947426447 is about 2076.0256368240.

It can be divided in two parts, 89474 and 26447, that added together give a triangular number (115921 = T₄₈₁).

The spelling of 8947426447 in words is "eight billion, nine hundred forty-seven million, four hundred twenty-six thousand, four hundred forty-seven".