117212809757 has 2 divisors, whose sum is σ = 117212809758. Its totient is φ = 117212809756.

The previous prime is 117212809729. The next prime is 117212809781. The reversal of 117212809757 is 757908212711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67361530681 + 49851279076 = 259541^2 + 223274^2 .

It is a cyclic number.

It is not a de Polignac number, because 117212809757 - 2¹⁰ = 117212808733 is a prime.

It is a super-2 number, since 2×117212809757² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117212809717) 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, 58606404878 + 58606404879.

It is an arithmetic number, because the mean of its divisors is an integer number (58606404879).

Almost surely, 2^117212809757 is an apocalyptic number.

It is an amenable number.

117212809757 is a deficient number, since it is larger than the sum of its proper divisors (1).

117212809757 is an equidigital number, since it uses as much as digits as its factorization.

117212809757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 493920, while the sum is 50.

The spelling of 117212809757 in words is "one hundred seventeen billion, two hundred twelve million, eight hundred nine thousand, seven hundred fifty-seven".