206929 has 4 divisors (see below), whose sum is σ = 217840. Its totient is φ = 196020.

The previous prime is 206923. The next prime is 206933. The reversal of 206929 is 929602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 929602 = 2 ⋅464801.

It is a cyclic number.

It is not a de Polignac number, because 206929 - 2⁵ = 206897 is a prime.

It is a super-2 number, since 2×206929² = 85639222082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206897 and 206906.

It is not an unprimeable number, because it can be changed into a prime (206923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5427 + ... + 5464.

It is an arithmetic number, because the mean of its divisors is an integer number (54460).

2²⁰⁶⁹²⁹ is an apocalyptic number.

It is an amenable number.

206929 is a deficient number, since it is larger than the sum of its proper divisors (10911).

206929 is a wasteful number, since it uses less digits than its factorization.

206929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10910.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 206929 is about 454.8944932619. The cubic root of 206929 is about 59.1480529515.

The spelling of 206929 in words is "two hundred six thousand, nine hundred twenty-nine".