64517 has 4 divisors (see below), whose sum is σ = 65100. Its totient is φ = 63936.

The previous prime is 64513. The next prime is 64553. The reversal of 64517 is 71546.

64517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 254²+1.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7396 + 57121 = 86^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 64517 - 2² = 64513 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 64492 and 64501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68 + ... + 365.

It is an arithmetic number, because the mean of its divisors is an integer number (16275).

2⁶⁴⁵¹⁷ is an apocalyptic number.

It is an amenable number.

64517 is a deficient number, since it is larger than the sum of its proper divisors (583).

64517 is a wasteful number, since it uses less digits than its factorization.

64517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582.

The product of its digits is 840, while the sum is 23.

The square root of 64517 is about 254.0019684963. The cubic root of 64517 is about 40.1074196008.

The spelling of 64517 in words is "sixty-four thousand, five hundred seventeen".