850181 has 2 divisors, whose sum is σ = 850182. Its totient is φ = 850180.

The previous prime is 850177. The next prime is 850189. The reversal of 850181 is 181058.

850181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 792100 + 58081 = 890^2 + 241^2 .

It is a cyclic number.

It is not a de Polignac number, because 850181 - 2² = 850177 is a prime.

It is a super-2 number, since 2×850181² = 1445615465522, which contains 22 as substring.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

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 850181.

It is not a weakly prime, because it can be changed into another prime (850189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425090 + 425091.

It is an arithmetic number, because the mean of its divisors is an integer number (425091).

2⁸⁵⁰¹⁸¹ is an apocalyptic number.

It is an amenable number.

850181 is a deficient number, since it is larger than the sum of its proper divisors (1).

850181 is an equidigital number, since it uses as much as digits as its factorization.

850181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 850181 is about 922.0526015364. The cubic root of 850181 is about 94.7335469885.

The spelling of 850181 in words is "eight hundred fifty thousand, one hundred eighty-one".