206321239 has 2 divisors, whose sum is σ = 206321240. Its totient is φ = 206321238.

The previous prime is 206321191. The next prime is 206321261. The reversal of 206321239 is 932123602.

206321239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206321239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206321039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103160619 + 103160620.

It is an arithmetic number, because the mean of its divisors is an integer number (103160620).

Almost surely, 2^206321239 is an apocalyptic number.

206321239 is a deficient number, since it is larger than the sum of its proper divisors (1).

206321239 is an equidigital number, since it uses as much as digits as its factorization.

206321239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 206321239 is about 14363.8866258405. The cubic root of 206321239 is about 590.9008922004.

The spelling of 206321239 in words is "two hundred six million, three hundred twenty-one thousand, two hundred thirty-nine".