206424336709 has 2 divisors, whose sum is σ = 206424336710. Its totient is φ = 206424336708.

The previous prime is 206424336631. The next prime is 206424336719. The reversal of 206424336709 is 907633424602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143963330625 + 62461006084 = 379425^2 + 249922^2 .

It is a cyclic number.

It is not a de Polignac number, because 206424336709 - 2¹¹ = 206424334661 is a prime.

It is a super-2 number, since 2×206424336709² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206424336719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103212168354 + 103212168355.

It is an arithmetic number, because the mean of its divisors is an integer number (103212168355).

Almost surely, 2^206424336709 is an apocalyptic number.

It is an amenable number.

206424336709 is a deficient number, since it is larger than the sum of its proper divisors (1).

206424336709 is an equidigital number, since it uses as much as digits as its factorization.

206424336709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 46.

The spelling of 206424336709 in words is "two hundred six billion, four hundred twenty-four million, three hundred thirty-six thousand, seven hundred nine".