206021873 has 2 divisors, whose sum is σ = 206021874. Its totient is φ = 206021872.

The previous prime is 206021863. The next prime is 206021891. The reversal of 206021873 is 378120602.

It is a happy number.

206021873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125596849 + 80425024 = 11207^2 + 8968^2 .

It is a cyclic number.

It is not a de Polignac number, because 206021873 - 2¹⁶ = 205956337 is a prime.

It is not a weakly prime, because it can be changed into another prime (206021863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103010936 + 103010937.

It is an arithmetic number, because the mean of its divisors is an integer number (103010937).

Almost surely, 2^206021873 is an apocalyptic number.

It is an amenable number.

206021873 is a deficient number, since it is larger than the sum of its proper divisors (1).

206021873 is an equidigital number, since it uses as much as digits as its factorization.

206021873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 206021873 is about 14353.4620562427. The cubic root of 206021873 is about 590.6149606386.

The spelling of 206021873 in words is "two hundred six million, twenty-one thousand, eight hundred seventy-three".