64688171 has 4 divisors (see below), whose sum is σ = 65599344. Its totient is φ = 63777000.

The previous prime is 64688159. The next prime is 64688191. The reversal of 64688171 is 17188646.

64688171 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.

It is a cyclic number.

It is not a de Polignac number, because 64688171 - 2¹⁴ = 64671787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64688101) 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, 455480 + ... + 455621.

It is an arithmetic number, because the mean of its divisors is an integer number (16399836).

Almost surely, 2^64688171 is an apocalyptic number.

64688171 is a deficient number, since it is larger than the sum of its proper divisors (911173).

64688171 is an equidigital number, since it uses as much as digits as its factorization.

64688171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911172.

The product of its digits is 64512, while the sum is 41.

The square root of 64688171 is about 8042.8956850130. The cubic root of 64688171 is about 401.4285813973.

The spelling of 64688171 in words is "sixty-four million, six hundred eighty-eight thousand, one hundred seventy-one".