638473 has 4 divisors (see below), whose sum is σ = 696528. Its totient is φ = 580420.

The previous prime is 638467. The next prime is 638489. The reversal of 638473 is 374836.

638473 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 638473 - 2¹³ = 630281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638423) 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, 29011 + ... + 29032.

It is an arithmetic number, because the mean of its divisors is an integer number (174132).

2⁶³⁸⁴⁷³ is an apocalyptic number.

It is an amenable number.

638473 is a deficient number, since it is larger than the sum of its proper divisors (58055).

638473 is a wasteful number, since it uses less digits than its factorization.

638473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58054.

The product of its digits is 12096, while the sum is 31.

The square root of 638473 is about 799.0450550501. The cubic root of 638473 is about 86.1087950662.

It can be divided in two parts, 638 and 473, that added together give a palindrome (1111).

The spelling of 638473 in words is "six hundred thirty-eight thousand, four hundred seventy-three".