206641147 has 2 divisors, whose sum is σ = 206641148. Its totient is φ = 206641146.

The previous prime is 206641129. The next prime is 206641213. The reversal of 206641147 is 741146602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206641147 - 2²³ = 198252539 is a prime.

It is not a weakly prime, because it can be changed into another prime (206641847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103320573 + 103320574.

It is an arithmetic number, because the mean of its divisors is an integer number (103320574).

Almost surely, 2^206641147 is an apocalyptic number.

206641147 is a deficient number, since it is larger than the sum of its proper divisors (1).

206641147 is an equidigital number, since it uses as much as digits as its factorization.

206641147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 206641147 is about 14375.0181565103. The cubic root of 206641147 is about 591.2061383729.

Adding to 206641147 its reverse (741146602), we get a palindrome (947787749).

The spelling of 206641147 in words is "two hundred six million, six hundred forty-one thousand, one hundred forty-seven".