233861 has 2 divisors, whose sum is σ = 233862. Its totient is φ = 233860.

The previous prime is 233851. The next prime is 233879. The reversal of 233861 is 168332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231361 + 2500 = 481^2 + 50^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233861 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116930 + 116931.

It is an arithmetic number, because the mean of its divisors is an integer number (116931).

2²³³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

233861 is a deficient number, since it is larger than the sum of its proper divisors (1).

233861 is an equidigital number, since it uses as much as digits as its factorization.

233861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 233861 is about 483.5917699879. The cubic root of 233861 is about 61.6101974741.

The spelling of 233861 in words is "two hundred thirty-three thousand, eight hundred sixty-one".