53659809 has 24 divisors (see below), whose sum is σ = 90039872. Its totient is φ = 30157920.

The previous prime is 53659799. The next prime is 53659811. The reversal of 53659809 is 90895635.

53659809 is a `hidden beast` number, since 53 + 6 + 598 + 0 + 9 = 666.

It is not a de Polignac number, because 53659809 - 2⁵ = 53659777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53659909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3139 + ... + 10824.

Almost surely, 2^53659809 is an apocalyptic number.

It is an amenable number.

53659809 is a deficient number, since it is larger than the sum of its proper divisors (36380063).

53659809 is a wasteful number, since it uses less digits than its factorization.

53659809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14037 (or 14034 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 53659809 is about 7325.2855917022. The cubic root of 53659809 is about 377.1809130601.

The spelling of 53659809 in words is "fifty-three million, six hundred fifty-nine thousand, eight hundred nine".