206553239 has 2 divisors, whose sum is σ = 206553240. Its totient is φ = 206553238.

The previous prime is 206553229. The next prime is 206553241. The reversal of 206553239 is 932355602.

It is a happy number.

206553239 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 not a de Polignac number, because 206553239 - 2⁴ = 206553223 is a prime.

It is a super-2 number, since 2×206553239² = 85328481082782242, which contains 22 as substring.

Together with 206553241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 206553199 and 206553208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206553229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103276619 + 103276620.

It is an arithmetic number, because the mean of its divisors is an integer number (103276620).

Almost surely, 2^206553239 is an apocalyptic number.

206553239 is a deficient number, since it is larger than the sum of its proper divisors (1).

206553239 is an equidigital number, since it uses as much as digits as its factorization.

206553239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 35.

The square root of 206553239 is about 14371.9601655446. The cubic root of 206553239 is about 591.1222907276.

The spelling of 206553239 in words is "two hundred six million, five hundred fifty-three thousand, two hundred thirty-nine".