171190717493 has 2 divisors, whose sum is σ = 171190717494. Its totient is φ = 171190717492.

The previous prime is 171190717487. The next prime is 171190717543. The reversal of 171190717493 is 394717091171.

It is a happy number.

It is an a-pointer prime, because the next prime (171190717543) can be obtained adding 171190717493 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166543977604 + 4646739889 = 408098^2 + 68167^2 .

It is a cyclic number.

It is not a de Polignac number, because 171190717493 - 2³⁴ = 154010848309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171190717403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85595358746 + 85595358747.

It is an arithmetic number, because the mean of its divisors is an integer number (85595358747).

Almost surely, 2^171190717493 is an apocalyptic number.

It is an amenable number.

171190717493 is a deficient number, since it is larger than the sum of its proper divisors (1).

171190717493 is an equidigital number, since it uses as much as digits as its factorization.

171190717493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 333396, while the sum is 50.

The spelling of 171190717493 in words is "one hundred seventy-one billion, one hundred ninety million, seven hundred seventeen thousand, four hundred ninety-three".