866963 has 2 divisors, whose sum is σ = 866964. Its totient is φ = 866962.

The previous prime is 866953. The next prime is 866969. The reversal of 866963 is 369668.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866963 - 2⁸ = 866707 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 866963.

It is not a weakly prime, because it can be changed into another prime (866969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433481 + 433482.

It is an arithmetic number, because the mean of its divisors is an integer number (433482).

2⁸⁶⁶⁹⁶³ is an apocalyptic number.

866963 is a deficient number, since it is larger than the sum of its proper divisors (1).

866963 is an equidigital number, since it uses as much as digits as its factorization.

866963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 866963 is about 931.1084791795. The cubic root of 866963 is about 95.3528154988.

The spelling of 866963 in words is "eight hundred sixty-six thousand, nine hundred sixty-three".