53643609 has 12 divisors (see below), whose sum is σ = 79985152. Its totient is φ = 34608600.

The previous prime is 53643563. The next prime is 53643641. The reversal of 53643609 is 90634635.

53643609 is a `hidden beast` number, since 5 + 3 + 6 + 43 + 609 = 666.

It is not a de Polignac number, because 53643609 - 2⁹ = 53643097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53643409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95857 + ... + 96414.

Almost surely, 2^53643609 is an apocalyptic number.

It is an amenable number.

53643609 is a deficient number, since it is larger than the sum of its proper divisors (26341543).

53643609 is a wasteful number, since it uses less digits than its factorization.

53643609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192308 (or 192305 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 53643609 is about 7324.1797492962. The cubic root of 53643609 is about 377.1429520243.

The spelling of 53643609 in words is "fifty-three million, six hundred forty-three thousand, six hundred nine".