852809 has 2 divisors, whose sum is σ = 852810. Its totient is φ = 852808.

The previous prime is 852799. The next prime is 852827. The reversal of 852809 is 908258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525625 + 327184 = 725^2 + 572^2 .

It is a cyclic number.

It is not a de Polignac number, because 852809 - 2⁴ = 852793 is a prime.

It is a super-3 number, since 3×852809³ = 1860700951172733387, which contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (852829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426404 + 426405.

It is an arithmetic number, because the mean of its divisors is an integer number (426405).

2⁸⁵²⁸⁰⁹ is an apocalyptic number.

It is an amenable number.

852809 is a deficient number, since it is larger than the sum of its proper divisors (1).

852809 is an equidigital number, since it uses as much as digits as its factorization.

852809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 852809 is about 923.4765833523. The cubic root of 852809 is about 94.8310570798.

It can be divided in two parts, 852 and 809, that added together give a palindrome (1661).

The spelling of 852809 in words is "eight hundred fifty-two thousand, eight hundred nine".