206580149 has 2 divisors, whose sum is σ = 206580150. Its totient is φ = 206580148.

The previous prime is 206580133. The next prime is 206580161. The reversal of 206580149 is 941085602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205005124 + 1575025 = 14318^2 + 1255^2 .

It is a cyclic number.

It is not a de Polignac number, because 206580149 - 2⁴ = 206580133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206580119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103290074 + 103290075.

It is an arithmetic number, because the mean of its divisors is an integer number (103290075).

Almost surely, 2^206580149 is an apocalyptic number.

It is an amenable number.

206580149 is a deficient number, since it is larger than the sum of its proper divisors (1).

206580149 is an equidigital number, since it uses as much as digits as its factorization.

206580149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 206580149 is about 14372.8963330291. The cubic root of 206580149 is about 591.1479603164.

The spelling of 206580149 in words is "two hundred six million, five hundred eighty thousand, one hundred forty-nine".