404315489 has 2 divisors, whose sum is σ = 404315490. Its totient is φ = 404315488.

The previous prime is 404315467. The next prime is 404315491. The reversal of 404315489 is 984513404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265429264 + 138886225 = 16292^2 + 11785^2 .

It is a cyclic number.

It is not a de Polignac number, because 404315489 - 2²⁸ = 135880033 is a prime.

Together with 404315491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (404315089) 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, 202157744 + 202157745.

It is an arithmetic number, because the mean of its divisors is an integer number (202157745).

Almost surely, 2^404315489 is an apocalyptic number.

It is an amenable number.

404315489 is a deficient number, since it is larger than the sum of its proper divisors (1).

404315489 is an equidigital number, since it uses as much as digits as its factorization.

404315489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 404315489 is about 20107.5977928742. The cubic root of 404315489 is about 739.4465602589.

The spelling of 404315489 in words is "four hundred four million, three hundred fifteen thousand, four hundred eighty-nine".