638273 has 4 divisors (see below), whose sum is σ = 666048. Its totient is φ = 610500.

The previous prime is 638269. The next prime is 638303. The reversal of 638273 is 372836.

638273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 638273 - 2² = 638269 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638233) 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, 13853 + ... + 13898.

It is an arithmetic number, because the mean of its divisors is an integer number (166512).

2⁶³⁸²⁷³ is an apocalyptic number.

It is an amenable number.

638273 is a deficient number, since it is larger than the sum of its proper divisors (27775).

638273 is a wasteful number, since it uses less digits than its factorization.

638273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27774.

The product of its digits is 6048, while the sum is 29.

The square root of 638273 is about 798.9198958594. The cubic root of 638273 is about 86.0998030089.

The spelling of 638273 in words is "six hundred thirty-eight thousand, two hundred seventy-three".