97261718117 has 2 divisors, whose sum is σ = 97261718118. Its totient is φ = 97261718116.

The previous prime is 97261718093. The next prime is 97261718137. The reversal of 97261718117 is 71181716279.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77020680676 + 20241037441 = 277526^2 + 142271^2 .

It is an emirp because it is prime and its reverse (71181716279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97261718117 - 2¹² = 97261714021 is a prime.

It is a super-2 number, since 2×97261718117² (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 (97261718137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48630859058 + 48630859059.

It is an arithmetic number, because the mean of its divisors is an integer number (48630859059).

Almost surely, 2^97261718117 is an apocalyptic number.

It is an amenable number.

97261718117 is a deficient number, since it is larger than the sum of its proper divisors (1).

97261718117 is an equidigital number, since it uses as much as digits as its factorization.

97261718117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 296352, while the sum is 50.

The spelling of 97261718117 in words is "ninety-seven billion, two hundred sixty-one million, seven hundred eighteen thousand, one hundred seventeen".