206580823 has 2 divisors, whose sum is σ = 206580824. Its totient is φ = 206580822.

The previous prime is 206580811. The next prime is 206580883. The reversal of 206580823 is 328085602.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206580823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206580883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103290411 + 103290412.

It is an arithmetic number, because the mean of its divisors is an integer number (103290412).

Almost surely, 2^206580823 is an apocalyptic number.

206580823 is a deficient number, since it is larger than the sum of its proper divisors (1).

206580823 is an equidigital number, since it uses as much as digits as its factorization.

206580823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 206580823 is about 14372.9197799195. The cubic root of 206580823 is about 591.1486032199.

The spelling of 206580823 in words is "two hundred six million, five hundred eighty thousand, eight hundred twenty-three".