206556893 has 8 divisors (see below), whose sum is σ = 212949240. Its totient is φ = 200229120.

The previous prime is 206556887. The next prime is 206556901. The reversal of 206556893 is 398655602.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22629049 + 183927844 = 4757^2 + 13562^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206556893 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 (206556593) 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, 9608 + ... + 22481.

It is an arithmetic number, because the mean of its divisors is an integer number (26618655).

Almost surely, 2^206556893 is an apocalyptic number.

It is an amenable number.

206556893 is a deficient number, since it is larger than the sum of its proper divisors (6392347).

206556893 is a wasteful number, since it uses less digits than its factorization.

206556893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32287.

The product of its (nonzero) digits is 388800, while the sum is 44.

The square root of 206556893 is about 14372.0872875167. The cubic root of 206556893 is about 591.1257764280.

The spelling of 206556893 in words is "two hundred six million, five hundred fifty-six thousand, eight hundred ninety-three".