82081793 has 2 divisors, whose sum is σ = 82081794. Its totient is φ = 82081792.

The previous prime is 82081781. The next prime is 82081829. The reversal of 82081793 is 39718028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70845889 + 11235904 = 8417^2 + 3352^2 .

It is a cyclic number.

It is not a de Polignac number, because 82081793 - 2⁸ = 82081537 is a prime.

It is equal to p_4783961 and since 82081793 and 4783961 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (82081093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41040896 + 41040897.

It is an arithmetic number, because the mean of its divisors is an integer number (41040897).

Almost surely, 2^82081793 is an apocalyptic number.

It is an amenable number.

82081793 is a deficient number, since it is larger than the sum of its proper divisors (1).

82081793 is an equidigital number, since it uses as much as digits as its factorization.

82081793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 82081793 is about 9059.9002753893. The cubic root of 82081793 is about 434.5925510522.

It can be divided in two parts, 8208 and 1793, that added together give a palindrome (10001).

The spelling of 82081793 in words is "eighty-two million, eighty-one thousand, seven hundred ninety-three".