57805609 has 3 divisors (see below), whose sum is σ = 57813213. Its totient is φ = 57798006.

The previous prime is 57805597. The next prime is 57805651. The reversal of 57805609 is 90650875.

It is a happy number.

The square root of 57805609 is 7603.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 57805609 - 2¹⁹ = 57281321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57805109) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3802 + ... + 11404.

It is an arithmetic number, because the mean of its divisors is an integer number (19271071).

Almost surely, 2^57805609 is an apocalyptic number.

57805609 is the 7603-rd square number.

57805609 is the 3802-nd centered octagonal number.

It is an amenable number.

57805609 is a deficient number, since it is larger than the sum of its proper divisors (7604).

57805609 is an frugal number, since it uses more digits than its factorization.

57805609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15206 (or 7603 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The cubic root of 57805609 is about 386.6547296982.

The spelling of 57805609 in words is "fifty-seven million, eight hundred five thousand, six hundred nine".