206140547 has 2 divisors, whose sum is σ = 206140548. Its totient is φ = 206140546.

The previous prime is 206140523. The next prime is 206140553. The reversal of 206140547 is 745041602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206140547 - 2²² = 201946243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206140567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103070273 + 103070274.

It is an arithmetic number, because the mean of its divisors is an integer number (103070274).

Almost surely, 2^206140547 is an apocalyptic number.

206140547 is a deficient number, since it is larger than the sum of its proper divisors (1).

206140547 is an equidigital number, since it uses as much as digits as its factorization.

206140547 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 206140547 is about 14357.5954463134. The cubic root of 206140547 is about 590.7283421049.

The spelling of 206140547 in words is "two hundred six million, one hundred forty thousand, five hundred forty-seven".