81944527 has 8 divisors (see below), whose sum is σ = 95935392. Its totient is φ = 68524800.

The previous prime is 81944521. The next prime is 81944543. The reversal of 81944527 is 72544918.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81944527 - 2⁷ = 81944399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81944527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81944521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142474 + ... + 143047.

It is an arithmetic number, because the mean of its divisors is an integer number (11991924).

Almost surely, 2^81944527 is an apocalyptic number.

81944527 is a deficient number, since it is larger than the sum of its proper divisors (13990865).

81944527 is a wasteful number, since it uses less digits than its factorization.

81944527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285569.

The product of its digits is 80640, while the sum is 40.

The square root of 81944527 is about 9052.3216359120. The cubic root of 81944527 is about 434.3501584193.

It can be divided in two parts, 8194 and 4527, that added together give a palindrome (12721).

The spelling of 81944527 in words is "eighty-one million, nine hundred forty-four thousand, five hundred twenty-seven".