97112121161689 has 2 divisors, whose sum is σ = 97112121161690. Its totient is φ = 97112121161688.

The previous prime is 97112121161663. The next prime is 97112121161717. The reversal of 97112121161689 is 98616112121179.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60655981358025 + 36456139803664 = 7788195^2 + 6037892^2 .

It is an emirp because it is prime and its reverse (98616112121179) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97112121161689 is a prime.

It is not a weakly prime, because it can be changed into another prime (97112121161789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48556060580844 + 48556060580845.

It is an arithmetic number, because the mean of its divisors is an integer number (48556060580845).

Almost surely, 2^{97112121161689} is an apocalyptic number.

It is an amenable number.

97112121161689 is a deficient number, since it is larger than the sum of its proper divisors (1).

97112121161689 is an equidigital number, since it uses as much as digits as its factorization.

97112121161689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 55.

The spelling of 97112121161689 in words is "ninety-seven trillion, one hundred twelve billion, one hundred twenty-one million, one hundred sixty-one thousand, six hundred eighty-nine".