659804409 has 36 divisors (see below), whose sum is σ = 1063321168. Its totient is φ = 393869520.

The previous prime is 659804371. The next prime is 659804419. The reversal of 659804409 is 904408956.

It is a happy number.

It is not a de Polignac number, because 659804409 - 2¹³ = 659796217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659804419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 68442 + ... + 77484.

Almost surely, 2^659804409 is an apocalyptic number.

It is an amenable number.

659804409 is a deficient number, since it is larger than the sum of its proper divisors (403516759).

659804409 is a wasteful number, since it uses less digits than its factorization.

659804409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9138 (or 9124 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 659804409 is about 25686.6581905860. The cubic root of 659804409 is about 870.5727540445.

The spelling of 659804409 in words is "six hundred fifty-nine million, eight hundred four thousand, four hundred nine".