406700209 has 2 divisors, whose sum is σ = 406700210. Its totient is φ = 406700208.

The previous prime is 406700201. The next prime is 406700227. The reversal of 406700209 is 902007604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366339600 + 40360609 = 19140^2 + 6353^2 .

It is a cyclic number.

It is not a de Polignac number, because 406700209 - 2³ = 406700201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (406700201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203350104 + 203350105.

It is an arithmetic number, because the mean of its divisors is an integer number (203350105).

Almost surely, 2^406700209 is an apocalyptic number.

It is an amenable number.

406700209 is a deficient number, since it is larger than the sum of its proper divisors (1).

406700209 is an equidigital number, since it uses as much as digits as its factorization.

406700209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 406700209 is about 20166.8095890252. The cubic root of 406700209 is about 740.8975042830.

The spelling of 406700209 in words is "four hundred six million, seven hundred thousand, two hundred nine".