406809229 has 2 divisors, whose sum is σ = 406809230. Its totient is φ = 406809228.

The previous prime is 406809131. The next prime is 406809239. The reversal of 406809229 is 922908604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 387184329 + 19624900 = 19677^2 + 4430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406809229 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 406809191 and 406809200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406809239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203404614 + 203404615.

It is an arithmetic number, because the mean of its divisors is an integer number (203404615).

Almost surely, 2^406809229 is an apocalyptic number.

It is an amenable number.

406809229 is a deficient number, since it is larger than the sum of its proper divisors (1).

406809229 is an equidigital number, since it uses as much as digits as its factorization.

406809229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 406809229 is about 20169.5123639616. The cubic root of 406809229 is about 740.9636999950.

The spelling of 406809229 in words is "four hundred six million, eight hundred nine thousand, two hundred twenty-nine".