171201617 has 2 divisors, whose sum is σ = 171201618. Its totient is φ = 171201616.

The previous prime is 171201593. The next prime is 171201629. The reversal of 171201617 is 716102171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171060241 + 141376 = 13079^2 + 376^2 .

It is a cyclic number.

It is not a de Polignac number, because 171201617 - 2¹⁶ = 171136081 is a prime.

It is not a weakly prime, because it can be changed into another prime (171201677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85600808 + 85600809.

It is an arithmetic number, because the mean of its divisors is an integer number (85600809).

Almost surely, 2^171201617 is an apocalyptic number.

It is an amenable number.

171201617 is a deficient number, since it is larger than the sum of its proper divisors (1).

171201617 is an equidigital number, since it uses as much as digits as its factorization.

171201617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 26.

The square root of 171201617 is about 13084.4035783065. The cubic root of 171201617 is about 555.2679678841.

Adding to 171201617 its reverse (716102171), we get a palindrome (887303788).

The spelling of 171201617 in words is "one hundred seventy-one million, two hundred one thousand, six hundred seventeen".