64487 has 4 divisors (see below), whose sum is σ = 65640. Its totient is φ = 63336.

The previous prime is 64483. The next prime is 64489. The reversal of 64487 is 78446.

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 64487 - 2² = 64483 is a prime.

It is a d-powerful number, because it can be written as 6⁶ + 4⁴ + 4⁴ + 8³ + 7⁵ .

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64483) 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, 488 + ... + 605.

It is an arithmetic number, because the mean of its divisors is an integer number (16410).

2⁶⁴⁴⁸⁷ is an apocalyptic number.

64487 is a deficient number, since it is larger than the sum of its proper divisors (1153).

64487 is a wasteful number, since it uses less digits than its factorization.

64487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152.

The product of its digits is 5376, while the sum is 29.

The square root of 64487 is about 253.9429069693. The cubic root of 64487 is about 40.1012020709.

Adding to 64487 its sum of digits (29), we get a square (64516 = 254²).

The spelling of 64487 in words is "sixty-four thousand, four hundred eighty-seven".