206617379 has 2 divisors, whose sum is σ = 206617380. Its totient is φ = 206617378.

The previous prime is 206617297. The next prime is 206617399. The reversal of 206617379 is 973716602.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206617379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206617399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103308689 + 103308690.

It is an arithmetic number, because the mean of its divisors is an integer number (103308690).

Almost surely, 2^206617379 is an apocalyptic number.

206617379 is a deficient number, since it is larger than the sum of its proper divisors (1).

206617379 is an equidigital number, since it uses as much as digits as its factorization.

206617379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 206617379 is about 14374.1914207374. The cubic root of 206617379 is about 591.1834705315.

The spelling of 206617379 in words is "two hundred six million, six hundred seventeen thousand, three hundred seventy-nine".