64503 has 8 divisors (see below), whose sum is σ = 95600. Its totient is φ = 42984.

The previous prime is 64499. The next prime is 64513. The reversal of 64503 is 30546.

It is a happy number.

It is not a de Polignac number, because 64503 - 2² = 64499 is a prime.

It is a Duffinian number.

64503 is a lucky 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 (64513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1168 + ... + 1221.

It is an arithmetic number, because the mean of its divisors is an integer number (11950).

2⁶⁴⁵⁰³ is an apocalyptic number.

64503 is a deficient number, since it is larger than the sum of its proper divisors (31097).

64503 is a wasteful number, since it uses less digits than its factorization.

64503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 2392 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 64503 is about 253.9744081596. The cubic root of 64503 is about 40.1045183268.

The spelling of 64503 in words is "sixty-four thousand, five hundred three".