206884425109 has 2 divisors, whose sum is σ = 206884425110. Its totient is φ = 206884425108.

The previous prime is 206884425103. The next prime is 206884425157. The reversal of 206884425109 is 901524488602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184644668209 + 22239756900 = 429703^2 + 149130^2 .

It is a cyclic number.

It is not a de Polignac number, because 206884425109 - 2⁹ = 206884424597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206884425103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103442212554 + 103442212555.

It is an arithmetic number, because the mean of its divisors is an integer number (103442212555).

Almost surely, 2^206884425109 is an apocalyptic number.

It is an amenable number.

206884425109 is a deficient number, since it is larger than the sum of its proper divisors (1).

206884425109 is an equidigital number, since it uses as much as digits as its factorization.

206884425109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 206884425109 in words is "two hundred six billion, eight hundred eighty-four million, four hundred twenty-five thousand, one hundred nine".