235813 has 2 divisors, whose sum is σ = 235814. Its totient is φ = 235812.

The previous prime is 235811. The next prime is 235849. The reversal of 235813 is 318532.

235813 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., 134689 + 101124 = 367^2 + 318^2 .

It is a cyclic number.

It is not a de Polignac number, because 235813 - 2¹ = 235811 is a prime.

Together with 235811, it forms a pair of twin primes.

235813 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (235811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117906 + 117907.

It is an arithmetic number, because the mean of its divisors is an integer number (117907).

2²³⁵⁸¹³ is an apocalyptic number.

It is an amenable number.

235813 is a deficient number, since it is larger than the sum of its proper divisors (1).

235813 is an equidigital number, since it uses as much as digits as its factorization.

235813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 235813 is about 485.6058072140. The cubic root of 235813 is about 61.7811395336.

The spelling of 235813 in words is "two hundred thirty-five thousand, eight hundred thirteen".