866329 has 2 divisors, whose sum is σ = 866330. Its totient is φ = 866328.

The previous prime is 866311. The next prime is 866353. The reversal of 866329 is 923668.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 851929 + 14400 = 923^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 866329 - 2⁹ = 865817 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 866294 and 866303.

It is not a weakly prime, because it can be changed into another prime (866309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433164 + 433165.

It is an arithmetic number, because the mean of its divisors is an integer number (433165).

2⁸⁶⁶³²⁹ is an apocalyptic number.

It is an amenable number.

866329 is a deficient number, since it is larger than the sum of its proper divisors (1).

866329 is an equidigital number, since it uses as much as digits as its factorization.

866329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 866329 is about 930.7679624912. The cubic root of 866329 is about 95.3295663608.

The spelling of 866329 in words is "eight hundred sixty-six thousand, three hundred twenty-nine".