171831340697 has 2 divisors, whose sum is σ = 171831340698. Its totient is φ = 171831340696.

The previous prime is 171831340631. The next prime is 171831340721. The reversal of 171831340697 is 796043138171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169575945616 + 2255395081 = 411796^2 + 47491^2 .

It is a cyclic number.

It is not a de Polignac number, because 171831340697 - 2⁸ = 171831340441 is a prime.

It is not a weakly prime, because it can be changed into another prime (171831346697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85915670348 + 85915670349.

It is an arithmetic number, because the mean of its divisors is an integer number (85915670349).

Almost surely, 2^171831340697 is an apocalyptic number.

It is an amenable number.

171831340697 is a deficient number, since it is larger than the sum of its proper divisors (1).

171831340697 is an equidigital number, since it uses as much as digits as its factorization.

171831340697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 171831340697 in words is "one hundred seventy-one billion, eight hundred thirty-one million, three hundred forty thousand, six hundred ninety-seven".