81088573 has 2 divisors, whose sum is σ = 81088574. Its totient is φ = 81088572.

The previous prime is 81088541. The next prime is 81088613. The reversal of 81088573 is 37588018.

It is an a-pointer prime, because the next prime (81088613) can be obtained adding 81088573 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54493924 + 26594649 = 7382^2 + 5157^2 .

It is a cyclic number.

It is not a de Polignac number, because 81088573 - 2⁵ = 81088541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81088673) 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, 40544286 + 40544287.

It is an arithmetic number, because the mean of its divisors is an integer number (40544287).

Almost surely, 2^81088573 is an apocalyptic number.

It is an amenable number.

81088573 is a deficient number, since it is larger than the sum of its proper divisors (1).

81088573 is an equidigital number, since it uses as much as digits as its factorization.

81088573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 81088573 is about 9004.9193777624. The cubic root of 81088573 is about 432.8325227427.

The spelling of 81088573 in words is "eighty-one million, eighty-eight thousand, five hundred seventy-three".