57685657 has 4 divisors (see below), whose sum is σ = 58663440. Its totient is φ = 56707876.

The previous prime is 57685651. The next prime is 57685673. The reversal of 57685657 is 75658675.

57685657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57685657 - 2¹⁹ = 57161369 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57685657.

It is not an unprimeable number, because it can be changed into a prime (57685651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 488803 + ... + 488920.

It is an arithmetic number, because the mean of its divisors is an integer number (14665860).

Almost surely, 2^57685657 is an apocalyptic number.

It is an amenable number.

57685657 is a deficient number, since it is larger than the sum of its proper divisors (977783).

57685657 is an equidigital number, since it uses as much as digits as its factorization.

57685657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977782.

The product of its digits is 1764000, while the sum is 49.

The square root of 57685657 is about 7595.1074383448. The cubic root of 57685657 is about 386.3870963496.

The spelling of 57685657 in words is "fifty-seven million, six hundred eighty-five thousand, six hundred fifty-seven".