64468687 has 4 divisors (see below), whose sum is σ = 66041136. Its totient is φ = 62896240.

The previous prime is 64468633. The next prime is 64468697. The reversal of 64468687 is 78686446.

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 64468687 - 2⁷ = 64468559 is a prime.

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 64468687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64468697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786163 + ... + 786244.

It is an arithmetic number, because the mean of its divisors is an integer number (16510284).

Almost surely, 2^64468687 is an apocalyptic number.

64468687 is a deficient number, since it is larger than the sum of its proper divisors (1572449).

64468687 is a wasteful number, since it uses less digits than its factorization.

64468687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572448.

The product of its digits is 1548288, while the sum is 49.

The square root of 64468687 is about 8029.2395032157. The cubic root of 64468687 is about 400.9740573553.

The spelling of 64468687 in words is "sixty-four million, four hundred sixty-eight thousand, six hundred eighty-seven".