73903720717 has 2 divisors, whose sum is σ = 73903720718. Its totient is φ = 73903720716.

The previous prime is 73903720711. The next prime is 73903720757. The reversal of 73903720717 is 71702730937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72608152681 + 1295568036 = 269459^2 + 35994^2 .

It is an emirp because it is prime and its reverse (71702730937) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73903720717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73903720711) 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, 36951860358 + 36951860359.

It is an arithmetic number, because the mean of its divisors is an integer number (36951860359).

Almost surely, 2^73903720717 is an apocalyptic number.

It is an amenable number.

73903720717 is a deficient number, since it is larger than the sum of its proper divisors (1).

73903720717 is an equidigital number, since it uses as much as digits as its factorization.

73903720717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 388962, while the sum is 46.

The spelling of 73903720717 in words is "seventy-three billion, nine hundred three million, seven hundred twenty thousand, seven hundred seventeen".