173211897697 has 2 divisors, whose sum is σ = 173211897698. Its totient is φ = 173211897696.

The previous prime is 173211897667. The next prime is 173211897713. The reversal of 173211897697 is 796798112371.

173211897697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138485202496 + 34726695201 = 372136^2 + 186351^2 .

It is an emirp because it is prime and its reverse (796798112371) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-173211897697 is a prime.

It is not a weakly prime, because it can be changed into another prime (173211897637) 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, 86605948848 + 86605948849.

It is an arithmetic number, because the mean of its divisors is an integer number (86605948849).

Almost surely, 2^173211897697 is an apocalyptic number.

It is an amenable number.

173211897697 is a deficient number, since it is larger than the sum of its proper divisors (1).

173211897697 is an equidigital number, since it uses as much as digits as its factorization.

173211897697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8001504, while the sum is 61.

The spelling of 173211897697 in words is "one hundred seventy-three billion, two hundred eleven million, eight hundred ninety-seven thousand, six hundred ninety-seven".