81343763 has 2 divisors, whose sum is σ = 81343764. Its totient is φ = 81343762.

The previous prime is 81343747. The next prime is 81343771. The reversal of 81343763 is 36734318.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81343763 - 2⁴ = 81343747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (81343733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40671881 + 40671882.

It is an arithmetic number, because the mean of its divisors is an integer number (40671882).

Almost surely, 2^81343763 is an apocalyptic number.

81343763 is a deficient number, since it is larger than the sum of its proper divisors (1).

81343763 is an equidigital number, since it uses as much as digits as its factorization.

81343763 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 81343763 is about 9019.0777244683. The cubic root of 81343763 is about 433.2860961658.

The spelling of 81343763 in words is "eighty-one million, three hundred forty-three thousand, seven hundred sixty-three".