206855479 has 2 divisors, whose sum is σ = 206855480. Its totient is φ = 206855478.

The previous prime is 206855423. The next prime is 206855533. The reversal of 206855479 is 974558602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206855479 - 2¹¹ = 206853431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206855179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103427739 + 103427740.

It is an arithmetic number, because the mean of its divisors is an integer number (103427740).

Almost surely, 2^206855479 is an apocalyptic number.

206855479 is a deficient number, since it is larger than the sum of its proper divisors (1).

206855479 is an equidigital number, since it uses as much as digits as its factorization.

206855479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 206855479 is about 14382.4712410629. The cubic root of 206855479 is about 591.4104710384.

The spelling of 206855479 in words is "two hundred six million, eight hundred fifty-five thousand, four hundred seventy-nine".