64386687 has 16 divisors (see below), whose sum is σ = 92574720. Its totient is φ = 39672000.

The previous prime is 64386671. The next prime is 64386703. The reversal of 64386687 is 78668346.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64386671) and next prime (64386703).

It is not a de Polignac number, because 64386687 - 2⁴ = 64386671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64386617) 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 15 ways as a sum of consecutive naturals, for example, 11439 + ... + 16112.

It is an arithmetic number, because the mean of its divisors is an integer number (5785920).

Almost surely, 2^64386687 is an apocalyptic number.

64386687 is a deficient number, since it is larger than the sum of its proper divisors (28188033).

64386687 is a wasteful number, since it uses less digits than its factorization.

64386687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27614.

The product of its digits is 1161216, while the sum is 48.

The square root of 64386687 is about 8024.1315417932. The cubic root of 64386687 is about 400.8039808709.

The spelling of 64386687 in words is "sixty-four million, three hundred eighty-six thousand, six hundred eighty-seven".