206210707613 has 2 divisors, whose sum is σ = 206210707614. Its totient is φ = 206210707612.

The previous prime is 206210707607. The next prime is 206210707621. The reversal of 206210707613 is 316707012602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206140516729 + 70190884 = 454027^2 + 8378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206210707613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206210787613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103105353806 + 103105353807.

It is an arithmetic number, because the mean of its divisors is an integer number (103105353807).

Almost surely, 2^206210707613 is an apocalyptic number.

It is an amenable number.

206210707613 is a deficient number, since it is larger than the sum of its proper divisors (1).

206210707613 is an equidigital number, since it uses as much as digits as its factorization.

206210707613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 206210707613 in words is "two hundred six billion, two hundred ten million, seven hundred seven thousand, six hundred thirteen".