53688657 has 16 divisors (see below), whose sum is σ = 80786880. Its totient is φ = 31416000.

The previous prime is 53688619. The next prime is 53688659. The reversal of 53688657 is 75688635.

53688657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53688657 - 2¹⁰ = 53687633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53688659) 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 15 ways as a sum of consecutive naturals, for example, 27094 + ... + 29007.

It is an arithmetic number, because the mean of its divisors is an integer number (5049180).

Almost surely, 2^53688657 is an apocalyptic number.

It is an amenable number.

53688657 is a deficient number, since it is larger than the sum of its proper divisors (27098223).

53688657 is a wasteful number, since it uses less digits than its factorization.

53688657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56144.

The product of its digits is 1209600, while the sum is 48.

The square root of 53688657 is about 7327.2543971122. The cubic root of 53688657 is about 377.2484929110.

It can be divided in two parts, 53688 and 657, that added together give a palindrome (54345).

The spelling of 53688657 in words is "fifty-three million, six hundred eighty-eight thousand, six hundred fifty-seven".