171349476217 has 2 divisors, whose sum is σ = 171349476218. Its totient is φ = 171349476216.

The previous prime is 171349476173. The next prime is 171349476247. The reversal of 171349476217 is 712674943171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109696089616 + 61653386601 = 331204^2 + 248301^2 .

It is a cyclic number.

It is not a de Polignac number, because 171349476217 - 2²³ = 171341087609 is a prime.

It is not a weakly prime, because it can be changed into another prime (171349476247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85674738108 + 85674738109.

It is an arithmetic number, because the mean of its divisors is an integer number (85674738109).

Almost surely, 2^171349476217 is an apocalyptic number.

It is an amenable number.

171349476217 is a deficient number, since it is larger than the sum of its proper divisors (1).

171349476217 is an equidigital number, since it uses as much as digits as its factorization.

171349476217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 52.

The spelling of 171349476217 in words is "one hundred seventy-one billion, three hundred forty-nine million, four hundred seventy-six thousand, two hundred seventeen".