638297 has 4 divisors (see below), whose sum is σ = 696336. Its totient is φ = 580260.

The previous prime is 638269. The next prime is 638303. The reversal of 638297 is 792836.

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 638297 - 2⁶ = 638233 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (632297) 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, 29003 + ... + 29024.

It is an arithmetic number, because the mean of its divisors is an integer number (174084).

2⁶³⁸²⁹⁷ is an apocalyptic number.

It is an amenable number.

638297 is a deficient number, since it is larger than the sum of its proper divisors (58039).

638297 is a wasteful number, since it uses less digits than its factorization.

638297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58038.

The product of its digits is 18144, while the sum is 35.

The square root of 638297 is about 798.9349159975. The cubic root of 638297 is about 86.1008821549.

It can be divided in two parts, 63829 and 7, that added together give a palindrome (63836).

The spelling of 638297 in words is "six hundred thirty-eight thousand, two hundred ninety-seven".