64573 has 4 divisors (see below), whose sum is σ = 66688. Its totient is φ = 62460.

The previous prime is 64567. The next prime is 64577. The reversal of 64573 is 37546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37546 = 2 ⋅18773.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64573 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 4⁶ + 5³ + 7 + 3¹⁰ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011 + ... + 1072.

It is an arithmetic number, because the mean of its divisors is an integer number (16672).

2⁶⁴⁵⁷³ is an apocalyptic number.

It is an amenable number.

64573 is a deficient number, since it is larger than the sum of its proper divisors (2115).

64573 is a wasteful number, since it uses less digits than its factorization.

64573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114.

The product of its digits is 2520, while the sum is 25.

The square root of 64573 is about 254.1121799521. The cubic root of 64573 is about 40.1190205017.

The spelling of 64573 in words is "sixty-four thousand, five hundred seventy-three".