638593 has 4 divisors (see below), whose sum is σ = 653488. Its totient is φ = 623700.

The previous prime is 638587. The next prime is 638621. The reversal of 638593 is 395836.

638593 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 638593 - 2⁹ = 638081 is a prime.

It is a Duffinian number.

638593 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (638893) 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, 7383 + ... + 7468.

It is an arithmetic number, because the mean of its divisors is an integer number (163372).

2⁶³⁸⁵⁹³ is an apocalyptic number.

It is an amenable number.

638593 is a deficient number, since it is larger than the sum of its proper divisors (14895).

638593 is a wasteful number, since it uses less digits than its factorization.

638593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14894.

The product of its digits is 19440, while the sum is 34.

The square root of 638593 is about 799.1201411553. The cubic root of 638593 is about 86.1141893993.

The spelling of 638593 in words is "six hundred thirty-eight thousand, five hundred ninety-three".