206990403 has 8 divisors (see below), whose sum is σ = 280106688. Its totient is φ = 135933864.

The previous prime is 206990369. The next prime is 206990411. The reversal of 206990403 is 304099602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 206990403 - 2⁹ = 206989891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (206990473) 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 in 7 ways as a sum of consecutive naturals, for example, 514701 + ... + 515102.

It is an arithmetic number, because the mean of its divisors is an integer number (35013336).

Almost surely, 2^206990403 is an apocalyptic number.

206990403 is a deficient number, since it is larger than the sum of its proper divisors (73116285).

206990403 is a wasteful number, since it uses less digits than its factorization.

206990403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029873.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 206990403 is about 14387.1610472671. The cubic root of 206990403 is about 591.5390279805.

The spelling of 206990403 in words is "two hundred six million, nine hundred ninety thousand, four hundred three".