81852713 has 2 divisors, whose sum is σ = 81852714. Its totient is φ = 81852712.

The previous prime is 81852707. The next prime is 81852763. The reversal of 81852713 is 31725818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61889689 + 19963024 = 7867^2 + 4468^2 .

It is a cyclic number.

It is not a de Polignac number, because 81852713 - 2⁶ = 81852649 is a prime.

It is not a weakly prime, because it can be changed into another prime (81852763) 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, 40926356 + 40926357.

It is an arithmetic number, because the mean of its divisors is an integer number (40926357).

Almost surely, 2^81852713 is an apocalyptic number.

It is an amenable number.

81852713 is a deficient number, since it is larger than the sum of its proper divisors (1).

81852713 is an equidigital number, since it uses as much as digits as its factorization.

81852713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 81852713 is about 9047.2489188703. The cubic root of 81852713 is about 434.1878765669.

The spelling of 81852713 in words is "eighty-one million, eight hundred fifty-two thousand, seven hundred thirteen".