419242409 has 2 divisors, whose sum is σ = 419242410. Its totient is φ = 419242408.

The previous prime is 419242399. The next prime is 419242451. The reversal of 419242409 is 904242914.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408040000 + 11202409 = 20200^2 + 3347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-419242409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (419242309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209621204 + 209621205.

It is an arithmetic number, because the mean of its divisors is an integer number (209621205).

Almost surely, 2^419242409 is an apocalyptic number.

It is an amenable number.

419242409 is a deficient number, since it is larger than the sum of its proper divisors (1).

419242409 is an equidigital number, since it uses as much as digits as its factorization.

419242409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 419242409 is about 20475.4098615876. The cubic root of 419242409 is about 748.4366897529.

The spelling of 419242409 in words is "four hundred nineteen million, two hundred forty-two thousand, four hundred nine".