97261718137 has 2 divisors, whose sum is σ = 97261718138. Its totient is φ = 97261718136.

The previous prime is 97261718117. The next prime is 97261718161. The reversal of 97261718137 is 73181716279.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96415839081 + 845879056 = 310509^2 + 29084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97261718137 is a prime.

It is a super-2 number, since 2×97261718137² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (97261718117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48630859068 + 48630859069.

It is an arithmetic number, because the mean of its divisors is an integer number (48630859069).

Almost surely, 2^97261718137 is an apocalyptic number.

It is an amenable number.

97261718137 is a deficient number, since it is larger than the sum of its proper divisors (1).

97261718137 is an equidigital number, since it uses as much as digits as its factorization.

97261718137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 889056, while the sum is 52.

The spelling of 97261718137 in words is "ninety-seven billion, two hundred sixty-one million, seven hundred eighteen thousand, one hundred thirty-seven".