206669371 has 2 divisors, whose sum is σ = 206669372. Its totient is φ = 206669370.

The previous prime is 206669363. The next prime is 206669413. The reversal of 206669371 is 173966602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206669371 - 2³ = 206669363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206669171) 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, 103334685 + 103334686.

It is an arithmetic number, because the mean of its divisors is an integer number (103334686).

Almost surely, 2^206669371 is an apocalyptic number.

206669371 is a deficient number, since it is larger than the sum of its proper divisors (1).

206669371 is an equidigital number, since it uses as much as digits as its factorization.

206669371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 206669371 is about 14375.9998260991. Note that the first 3 decimals coincide. The cubic root of 206669371 is about 591.2330537004.

The spelling of 206669371 in words is "two hundred six million, six hundred sixty-nine thousand, three hundred seventy-one".