8461143947 has 2 divisors, whose sum is σ = 8461143948. Its totient is φ = 8461143946.

The previous prime is 8461143931. The next prime is 8461143961. The reversal of 8461143947 is 7493411648.

8461143947 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8461143947 - 2⁴ = 8461143931 is a prime.

It is not a weakly prime, because it can be changed into another prime (8461143997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4230571973 + 4230571974.

It is an arithmetic number, because the mean of its divisors is an integer number (4230571974).

Almost surely, 2^8461143947 is an apocalyptic number.

8461143947 is a deficient number, since it is larger than the sum of its proper divisors (1).

8461143947 is an equidigital number, since it uses as much as digits as its factorization.

8461143947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 8461143947 is about 91984.4766631849. The cubic root of 8461143947 is about 2037.7130551267.

The spelling of 8461143947 in words is "eight billion, four hundred sixty-one million, one hundred forty-three thousand, nine hundred forty-seven".