206893980737 has 8 divisors (see below), whose sum is σ = 219627369000. Its totient is φ = 194223165184.

The previous prime is 206893980697. The next prime is 206893980743. The reversal of 206893980737 is 737089398602.

It is a happy number.

It is a Cunningham number, because it is equal to 454856²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 48839232016 + 158054748721 = 220996^2 + 397561^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 206893980737 - 2⁶ = 206893980673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206893980737.

It is not an unprimeable number, because it can be changed into a prime (206893980757) 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, 15636362 + ... + 15649587.

It is an arithmetic number, because the mean of its divisors is an integer number (27453421125).

Almost surely, 2^206893980737 is an apocalyptic number.

It is an amenable number.

206893980737 is a deficient number, since it is larger than the sum of its proper divisors (12733388263).

206893980737 is a wasteful number, since it uses less digits than its factorization.

206893980737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31286355.

The product of its (nonzero) digits is 27433728, while the sum is 62.

The spelling of 206893980737 in words is "two hundred six billion, eight hundred ninety-three million, nine hundred eighty thousand, seven hundred thirty-seven".