866941 has 2 divisors, whose sum is σ = 866942. Its totient is φ = 866940.

The previous prime is 866933. The next prime is 866953. The reversal of 866941 is 149668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 606841 + 260100 = 779^2 + 510^2 .

It is a cyclic number.

It is not a de Polignac number, because 866941 - 2³ = 866933 is a prime.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 866897 and 866906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433470 + 433471.

It is an arithmetic number, because the mean of its divisors is an integer number (433471).

2⁸⁶⁶⁹⁴¹ is an apocalyptic number.

It is an amenable number.

866941 is a deficient number, since it is larger than the sum of its proper divisors (1).

866941 is an equidigital number, since it uses as much as digits as its factorization.

866941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 34.

The square root of 866941 is about 931.0966652287. The cubic root of 866941 is about 95.3520089363.

The spelling of 866941 in words is "eight hundred sixty-six thousand, nine hundred forty-one".