405363209 has 2 divisors, whose sum is σ = 405363210. Its totient is φ = 405363208.

The previous prime is 405363191. The next prime is 405363241. The reversal of 405363209 is 902363504.

405363209 is nontrivially palindromic in base 4.

It is an a-pointer prime, because the next prime (405363241) can be obtained adding 405363209 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381811600 + 23551609 = 19540^2 + 4853^2 .

It is a cyclic number.

It is not a de Polignac number, because 405363209 - 2¹² = 405359113 is a prime.

It is not a weakly prime, because it can be changed into another prime (405363289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202681604 + 202681605.

It is an arithmetic number, because the mean of its divisors is an integer number (202681605).

Almost surely, 2^405363209 is an apocalyptic number.

It is an amenable number.

405363209 is a deficient number, since it is larger than the sum of its proper divisors (1).

405363209 is an equidigital number, since it uses as much as digits as its factorization.

405363209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 405363209 is about 20133.6337753521. The cubic root of 405363209 is about 740.0847291587.

The spelling of 405363209 in words is "four hundred five million, three hundred sixty-three thousand, two hundred nine".