171880038697 has 2 divisors, whose sum is σ = 171880038698. Its totient is φ = 171880038696.

The previous prime is 171880038691. The next prime is 171880038779. The reversal of 171880038697 is 796830088171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164325647641 + 7554391056 = 405371^2 + 86916^2 .

It is a cyclic number.

It is not a de Polignac number, because 171880038697 - 2³ = 171880038689 is a prime.

It is not a weakly prime, because it can be changed into another prime (171880038691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85940019348 + 85940019349.

It is an arithmetic number, because the mean of its divisors is an integer number (85940019349).

Almost surely, 2^171880038697 is an apocalyptic number.

It is an amenable number.

171880038697 is a deficient number, since it is larger than the sum of its proper divisors (1).

171880038697 is an equidigital number, since it uses as much as digits as its factorization.

171880038697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 58.

The spelling of 171880038697 in words is "one hundred seventy-one billion, eight hundred eighty million, thirty-eight thousand, six hundred ninety-seven".