638373 has 4 divisors (see below), whose sum is σ = 851168. Its totient is φ = 425580.

The previous prime is 638371. The next prime is 638423. The reversal of 638373 is 373836.

It is a happy number.

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 not a de Polignac number, because 638373 - 2¹ = 638371 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 638373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638371) 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, 106393 + ... + 106398.

It is an arithmetic number, because the mean of its divisors is an integer number (212792).

2⁶³⁸³⁷³ is an apocalyptic number.

It is an amenable number.

638373 is a deficient number, since it is larger than the sum of its proper divisors (212795).

638373 is a wasteful number, since it uses less digits than its factorization.

638373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212794.

The product of its digits is 9072, while the sum is 30.

The square root of 638373 is about 798.9824779055. The cubic root of 638373 is about 86.1042992723.

The spelling of 638373 in words is "six hundred thirty-eight thousand, three hundred seventy-three".