206992639 has 8 divisors (see below), whose sum is σ = 236981888. Its totient is φ = 177108120.

The previous prime is 206992637. The next prime is 206992651. The reversal of 206992639 is 936299602.

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

It is not a de Polignac number, because 206992639 - 2¹ = 206992637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206992637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21897 + ... + 29890.

It is an arithmetic number, because the mean of its divisors is an integer number (29622736).

Almost surely, 2^206992639 is an apocalyptic number.

206992639 is a deficient number, since it is larger than the sum of its proper divisors (29989249).

206992639 is an equidigital number, since it uses as much as digits as its factorization.

206992639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52365.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 206992639 is about 14387.2387552303. The cubic root of 206992639 is about 591.5411579931.

The spelling of 206992639 in words is "two hundred six million, nine hundred ninety-two thousand, six hundred thirty-nine".