638233 has 2 divisors, whose sum is σ = 638234. Its totient is φ = 638232.

The previous prime is 638201. The next prime is 638263. The reversal of 638233 is 332836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499849 + 138384 = 707^2 + 372^2 .

It is a cyclic number.

It is not a de Polignac number, because 638233 - 2⁵ = 638201 is a prime.

It is a super-3 number, since 3×638233³ = 779936099033386011, which contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 638198 and 638207.

It is not a weakly prime, because it can be changed into another prime (638263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319116 + 319117.

It is an arithmetic number, because the mean of its divisors is an integer number (319117).

2⁶³⁸²³³ is an apocalyptic number.

It is an amenable number.

638233 is a deficient number, since it is larger than the sum of its proper divisors (1).

638233 is an equidigital number, since it uses as much as digits as its factorization.

638233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

The square root of 638233 is about 798.8948616683. The cubic root of 638233 is about 86.0980043720.

The spelling of 638233 in words is "six hundred thirty-eight thousand, two hundred thirty-three".