236140813 has 2 divisors, whose sum is σ = 236140814. Its totient is φ = 236140812.

The previous prime is 236140789. The next prime is 236140841. The reversal of 236140813 is 318041632.

It is the 6274-th star number.

It is an a-pointer prime, because the next prime (236140841) can be obtained adding 236140813 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235991044 + 149769 = 15362^2 + 387^2 .

It is a cyclic number.

It is not a de Polignac number, because 236140813 - 2¹³ = 236132621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (236140213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118070406 + 118070407.

It is an arithmetic number, because the mean of its divisors is an integer number (118070407).

Almost surely, 2^236140813 is an apocalyptic number.

It is an amenable number.

236140813 is a deficient number, since it is larger than the sum of its proper divisors (1).

236140813 is an equidigital number, since it uses as much as digits as its factorization.

236140813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 236140813 is about 15366.8738850815. The cubic root of 236140813 is about 618.0975441523.

The spelling of 236140813 in words is "two hundred thirty-six million, one hundred forty thousand, eight hundred thirteen".