404585609 has 2 divisors, whose sum is σ = 404585610. Its totient is φ = 404585608.

The previous prime is 404585549. The next prime is 404585633. The reversal of 404585609 is 906585404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386987584 + 17598025 = 19672^2 + 4195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404585609 is a prime.

It is not a weakly prime, because it can be changed into another prime (404588609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202292804 + 202292805.

It is an arithmetic number, because the mean of its divisors is an integer number (202292805).

Almost surely, 2^404585609 is an apocalyptic number.

It is an amenable number.

404585609 is a deficient number, since it is larger than the sum of its proper divisors (1).

404585609 is an equidigital number, since it uses as much as digits as its factorization.

404585609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 404585609 is about 20114.3135353907. The cubic root of 404585609 is about 739.6111964118.

The spelling of 404585609 in words is "four hundred four million, five hundred eighty-five thousand, six hundred nine".