206920706 has 8 divisors (see below), whose sum is σ = 310468620. Its totient is φ = 103431168.

The previous prime is 206920667. The next prime is 206920709. The reversal of 206920706 is 607029602.

It can be written as a sum of positive squares in 2 ways, for example, as 204061225 + 2859481 = 14285^2 + 1691^2 .

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

It is not an unprimeable number, because it can be changed into a prime (206920709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4271 + ... + 20786.

Almost surely, 2^206920706 is an apocalyptic number.

206920706 is a deficient number, since it is larger than the sum of its proper divisors (103547914).

206920706 is a wasteful number, since it uses less digits than its factorization.

206920706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29188.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 206920706 is about 14384.7386489988. The cubic root of 206920706 is about 591.4726269569.

The spelling of 206920706 in words is "two hundred six million, nine hundred twenty thousand, seven hundred six".