8461143997 has 2 divisors, whose sum is σ = 8461143998. Its totient is φ = 8461143996.

The previous prime is 8461143989. The next prime is 8461144037. The reversal of 8461143997 is 7993411648.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7675687321 + 785456676 = 87611^2 + 28026^2 .

It is a cyclic number.

It is not a de Polignac number, because 8461143997 - 2³ = 8461143989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8461143947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4230571998 + 4230571999.

It is an arithmetic number, because the mean of its divisors is an integer number (4230571999).

Almost surely, 2^8461143997 is an apocalyptic number.

It is an amenable number.

8461143997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8461143997 is an equidigital number, since it uses as much as digits as its factorization.

8461143997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 52.

The square root of 8461143997 is about 91984.4769349698. The cubic root of 8461143997 is about 2037.7130591406.

The spelling of 8461143997 in words is "eight billion, four hundred sixty-one million, one hundred forty-three thousand, nine hundred ninety-seven".