866953 has 2 divisors, whose sum is σ = 866954. Its totient is φ = 866952.

The previous prime is 866941. The next prime is 866963. The reversal of 866953 is 359668.

866953 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., 795664 + 71289 = 892^2 + 267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866953 is a prime.

866953 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (866933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433476 + 433477.

It is an arithmetic number, because the mean of its divisors is an integer number (433477).

2⁸⁶⁶⁹⁵³ is an apocalyptic number.

It is an amenable number.

866953 is a deficient number, since it is larger than the sum of its proper divisors (1).

866953 is an equidigital number, since it uses as much as digits as its factorization.

866953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 866953 is about 931.1031092205. The cubic root of 866953 is about 95.3524488812.

The spelling of 866953 in words is "eight hundred sixty-six thousand, nine hundred fifty-three".