853823 has 2 divisors, whose sum is σ = 853824. Its totient is φ = 853822.

The previous prime is 853819. The next prime is 853837. The reversal of 853823 is 328358.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 853823 - 2² = 853819 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 8⁴ + 5⁸ + 8⁶ + 3⁹ + 2⁷ + 3¹¹ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426911 + 426912.

It is an arithmetic number, because the mean of its divisors is an integer number (426912).

2⁸⁵³⁸²³ is an apocalyptic number.

853823 is a deficient number, since it is larger than the sum of its proper divisors (1).

853823 is an equidigital number, since it uses as much as digits as its factorization.

853823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 853823 is about 924.0254325504. The cubic root of 853823 is about 94.8686272765.

The spelling of 853823 in words is "eight hundred fifty-three thousand, eight hundred twenty-three".