868669 has 2 divisors, whose sum is σ = 868670. Its totient is φ = 868668.

The previous prime is 868663. The next prime is 868691. The reversal of 868669 is 966868.

868669 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., 700569 + 168100 = 837^2 + 410^2 .

It is a cyclic number.

It is not a de Polignac number, because 868669 - 2⁹ = 868157 is a prime.

It is a super-2 number, since 2×868669² = 1509171663122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434334 + 434335.

It is an arithmetic number, because the mean of its divisors is an integer number (434335).

2⁸⁶⁸⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

868669 is a deficient number, since it is larger than the sum of its proper divisors (1).

868669 is an equidigital number, since it uses as much as digits as its factorization.

868669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 868669 is about 932.0241413182. The cubic root of 868669 is about 95.4153192498.

The spelling of 868669 in words is "eight hundred sixty-eight thousand, six hundred sixty-nine".