171976464380197 has 2 divisors, whose sum is σ = 171976464380198. Its totient is φ = 171976464380196.

The previous prime is 171976464380159. The next prime is 171976464380207. The reversal of 171976464380197 is 791083464679171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134825562096481 + 37150902283716 = 11611441^2 + 6095154^2 .

It is an emirp because it is prime and its reverse (791083464679171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171976464380197 - 2¹¹ = 171976464378149 is a prime.

It is a super-3 number, since 3×171976464380197³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171976464380117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85988232190098 + 85988232190099.

It is an arithmetic number, because the mean of its divisors is an integer number (85988232190099).

Almost surely, 2^{171976464380197} is an apocalyptic number.

It is an amenable number.

171976464380197 is a deficient number, since it is larger than the sum of its proper divisors (1).

171976464380197 is an equidigital number, since it uses as much as digits as its factorization.

171976464380197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384072192, while the sum is 73.

The spelling of 171976464380197 in words is "one hundred seventy-one trillion, nine hundred seventy-six billion, four hundred sixty-four million, three hundred eighty thousand, one hundred ninety-seven".