73820131717 has 2 divisors, whose sum is σ = 73820131718. Its totient is φ = 73820131716.

The previous prime is 73820131699. The next prime is 73820131727. The reversal of 73820131717 is 71713102837.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43999677121 + 29820454596 = 209761^2 + 172686^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73820131717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 73820131717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73820131727) 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, 36910065858 + 36910065859.

It is an arithmetic number, because the mean of its divisors is an integer number (36910065859).

Almost surely, 2^73820131717 is an apocalyptic number.

It is an amenable number.

73820131717 is a deficient number, since it is larger than the sum of its proper divisors (1).

73820131717 is an equidigital number, since it uses as much as digits as its factorization.

73820131717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 40.

The spelling of 73820131717 in words is "seventy-three billion, eight hundred twenty million, one hundred thirty-one thousand, seven hundred seventeen".