171739022489 has 2 divisors, whose sum is σ = 171739022490. Its totient is φ = 171739022488.

The previous prime is 171739022443. The next prime is 171739022509. The reversal of 171739022489 is 984220937171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170327893264 + 1411129225 = 412708^2 + 37565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171739022489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171739022489.

It is not a weakly prime, because it can be changed into another prime (171739022789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85869511244 + 85869511245.

It is an arithmetic number, because the mean of its divisors is an integer number (85869511245).

Almost surely, 2^171739022489 is an apocalyptic number.

It is an amenable number.

171739022489 is a deficient number, since it is larger than the sum of its proper divisors (1).

171739022489 is an equidigital number, since it uses as much as digits as its factorization.

171739022489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 171739022489 in words is "one hundred seventy-one billion, seven hundred thirty-nine million, twenty-two thousand, four hundred eighty-nine".