64873 has 4 divisors (see below), whose sum is σ = 67140. Its totient is φ = 62608.

The previous prime is 64871. The next prime is 64877. The reversal of 64873 is 37846.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43264 + 21609 = 208^2 + 147^2 .

It is a cyclic number.

It is not a de Polignac number, because 64873 - 2¹ = 64871 is a prime.

It is a super-2 number, since 2×64873² = 8417012258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64871) 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, 1090 + ... + 1147.

It is an arithmetic number, because the mean of its divisors is an integer number (16785).

2⁶⁴⁸⁷³ is an apocalyptic number.

It is an amenable number.

64873 is a deficient number, since it is larger than the sum of its proper divisors (2267).

64873 is a wasteful number, since it uses less digits than its factorization.

64873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2266.

The product of its digits is 4032, while the sum is 28.

The square root of 64873 is about 254.7017864091. The cubic root of 64873 is about 40.1810542475.

The spelling of 64873 in words is "sixty-four thousand, eight hundred seventy-three".