408242017 has 2 divisors, whose sum is σ = 408242018. Its totient is φ = 408242016.

The previous prime is 408242011. The next prime is 408242033. The reversal of 408242017 is 710242804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 408201616 + 40401 = 20204^2 + 201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408242017 is a prime.

It is not a weakly prime, because it can be changed into another prime (408242011) 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, 204121008 + 204121009.

It is an arithmetic number, because the mean of its divisors is an integer number (204121009).

Almost surely, 2^408242017 is an apocalyptic number.

It is an amenable number.

408242017 is a deficient number, since it is larger than the sum of its proper divisors (1).

408242017 is an equidigital number, since it uses as much as digits as its factorization.

408242017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 408242017 is about 20204.9998020292. Note that the first 3 decimals coincide. The cubic root of 408242017 is about 741.8325756908.

The spelling of 408242017 in words is "four hundred eight million, two hundred forty-two thousand, seventeen".