205976047 has 2 divisors, whose sum is σ = 205976048. Its totient is φ = 205976046.

The previous prime is 205976039. The next prime is 205976117. The reversal of 205976047 is 740679502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205976047 - 2³ = 205976039 is a prime.

It is a super-2 number, since 2×205976047² = 84852263875492418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205976027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102988023 + 102988024.

It is an arithmetic number, because the mean of its divisors is an integer number (102988024).

Almost surely, 2^205976047 is an apocalyptic number.

205976047 is a deficient number, since it is larger than the sum of its proper divisors (1).

205976047 is an equidigital number, since it uses as much as digits as its factorization.

205976047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 205976047 is about 14351.8656278548. The cubic root of 205976047 is about 590.5711666993.

The spelling of 205976047 in words is "two hundred five million, nine hundred seventy-six thousand, forty-seven".