239000813 has 2 divisors, whose sum is σ = 239000814. Its totient is φ = 239000812.

The previous prime is 239000779. The next prime is 239000831. The reversal of 239000813 is 318000932.

Together with next prime (239000831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 172055689 + 66945124 = 13117^2 + 8182^2 .

It is a cyclic number.

It is not a de Polignac number, because 239000813 - 2⁸ = 239000557 is a prime.

It is a super-2 number, since 2×239000813² = 114242777229321938, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239000873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119500406 + 119500407.

It is an arithmetic number, because the mean of its divisors is an integer number (119500407).

Almost surely, 2^239000813 is an apocalyptic number.

It is an amenable number.

239000813 is a deficient number, since it is larger than the sum of its proper divisors (1).

239000813 is an equidigital number, since it uses as much as digits as its factorization.

239000813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 239000813 is about 15459.6511280171. The cubic root of 239000813 is about 620.5828831615.

The spelling of 239000813 in words is "two hundred thirty-nine million, eight hundred thirteen", and thus it is an aban number.