81044317 has 2 divisors, whose sum is σ = 81044318. Its totient is φ = 81044316.

The previous prime is 81044311. The next prime is 81044333. The reversal of 81044317 is 71344018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65512836 + 15531481 = 8094^2 + 3941^2 .

It is a cyclic number.

It is not a de Polignac number, because 81044317 - 2⁷ = 81044189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81044311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40522158 + 40522159.

It is an arithmetic number, because the mean of its divisors is an integer number (40522159).

Almost surely, 2^81044317 is an apocalyptic number.

It is an amenable number.

81044317 is a deficient number, since it is larger than the sum of its proper divisors (1).

81044317 is an equidigital number, since it uses as much as digits as its factorization.

81044317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 81044317 is about 9002.4617188856. The cubic root of 81044317 is about 432.7537655627.

It can be divided in two parts, 8104 and 4317, that added together give a palindrome (12421).

The spelling of 81044317 in words is "eighty-one million, forty-four thousand, three hundred seventeen".