173861 has 2 divisors, whose sum is σ = 173862. Its totient is φ = 173860.

The previous prime is 173851. The next prime is 173867. The reversal of 173861 is 168371.

173861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164836 + 9025 = 406^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 173861 - 2¹⁴ = 157477 is a prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 173861.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 173861.

It is not a weakly prime, because it can be changed into another prime (173867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86930 + 86931.

It is an arithmetic number, because the mean of its divisors is an integer number (86931).

2¹⁷³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

173861 is a deficient number, since it is larger than the sum of its proper divisors (1).

173861 is an equidigital number, since it uses as much as digits as its factorization.

173861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 173861 is about 416.9664255069. The cubic root of 173861 is about 55.8128317591.

The spelling of 173861 in words is "one hundred seventy-three thousand, eight hundred sixty-one".