206689329 has 48 divisors (see below), whose sum is σ = 376032384. Its totient is φ = 106272000.

The previous prime is 206689321. The next prime is 206689337. The reversal of 206689329 is 923986602.

It is an interprime number because it is at equal distance from previous prime (206689321) and next prime (206689337).

It is not a de Polignac number, because 206689329 - 2³ = 206689321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206689321) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68517 + ... + 71469.

It is an arithmetic number, because the mean of its divisors is an integer number (7834008).

Almost surely, 2^206689329 is an apocalyptic number.

It is an amenable number.

206689329 is a deficient number, since it is larger than the sum of its proper divisors (169343055).

206689329 is a wasteful number, since it uses less digits than its factorization.

206689329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078 (or 3075 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 206689329 is about 14376.6939523661. The cubic root of 206689329 is about 591.2520848215.

The spelling of 206689329 in words is "two hundred six million, six hundred eighty-nine thousand, three hundred twenty-nine".