868529 has 2 divisors, whose sum is σ = 868530. Its totient is φ = 868528.

The previous prime is 868493. The next prime is 868531. The reversal of 868529 is 925868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664225 + 204304 = 815^2 + 452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868529 is a prime.

It is a Sophie Germain prime.

Together with 868531, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 868492 and 868501.

It is not a weakly prime, because it can be changed into another prime (868559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434264 + 434265.

It is an arithmetic number, because the mean of its divisors is an integer number (434265).

2⁸⁶⁸⁵²⁹ is an apocalyptic number.

It is an amenable number.

868529 is a deficient number, since it is larger than the sum of its proper divisors (1).

868529 is an equidigital number, since it uses as much as digits as its factorization.

868529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 868529 is about 931.9490329412. The cubic root of 868529 is about 95.4101930693.

The spelling of 868529 in words is "eight hundred sixty-eight thousand, five hundred twenty-nine".