171112681 has 2 divisors, whose sum is σ = 171112682. Its totient is φ = 171112680.

The previous prime is 171112621. The next prime is 171112703. The reversal of 171112681 is 186211171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170563600 + 549081 = 13060^2 + 741^2 .

It is a cyclic number.

It is not a de Polignac number, because 171112681 - 2¹⁹ = 170588393 is a prime.

It is a super-2 number, since 2×171112681² = 58559099198015522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (171112621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85556340 + 85556341.

It is an arithmetic number, because the mean of its divisors is an integer number (85556341).

Almost surely, 2^171112681 is an apocalyptic number.

It is an amenable number.

171112681 is a deficient number, since it is larger than the sum of its proper divisors (1).

171112681 is an equidigital number, since it uses as much as digits as its factorization.

171112681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 28.

The square root of 171112681 is about 13081.0045868045. The cubic root of 171112681 is about 555.1718008296.

The spelling of 171112681 in words is "one hundred seventy-one million, one hundred twelve thousand, six hundred eighty-one".