17081861 has 2 divisors, whose sum is σ = 17081862. Its totient is φ = 17081860.

The previous prime is 17081843. The next prime is 17081863. The reversal of 17081861 is 16818071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16564900 + 516961 = 4070^2 + 719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17081861 is a prime.

Together with 17081863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17081863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8540930 + 8540931.

It is an arithmetic number, because the mean of its divisors is an integer number (8540931).

Almost surely, 2^17081861 is an apocalyptic number.

It is an amenable number.

17081861 is a deficient number, since it is larger than the sum of its proper divisors (1).

17081861 is an equidigital number, since it uses as much as digits as its factorization.

17081861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 32.

The square root of 17081861 is about 4133.0208080773. The cubic root of 17081861 is about 257.5402193124.

The spelling of 17081861 in words is "seventeen million, eighty-one thousand, eight hundred sixty-one".