23207720717 has 2 divisors, whose sum is σ = 23207720718. Its totient is φ = 23207720716.

The previous prime is 23207720651. The next prime is 23207720761. The reversal of 23207720717 is 71702770232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22604821801 + 602898916 = 150349^2 + 24554^2 .

It is a cyclic number.

It is not a de Polignac number, because 23207720717 - 2⁸ = 23207720461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23207720317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11603860358 + 11603860359.

It is an arithmetic number, because the mean of its divisors is an integer number (11603860359).

Almost surely, 2^23207720717 is an apocalyptic number.

It is an amenable number.

23207720717 is a deficient number, since it is larger than the sum of its proper divisors (1).

23207720717 is an equidigital number, since it uses as much as digits as its factorization.

23207720717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57624, while the sum is 38.

The spelling of 23207720717 in words is "twenty-three billion, two hundred seven million, seven hundred twenty thousand, seven hundred seventeen".