638359 has 2 divisors, whose sum is σ = 638360. Its totient is φ = 638358.

The previous prime is 638347. The next prime is 638371. The reversal of 638359 is 953836.

It is a balanced prime because it is at equal distance from previous prime (638347) and next prime (638371).

It is a cyclic number.

It is not a de Polignac number, because 638359 - 2⁵ = 638327 is a prime.

638359 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (638059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319179 + 319180.

It is an arithmetic number, because the mean of its divisors is an integer number (319180).

2⁶³⁸³⁵⁹ is an apocalyptic number.

638359 is a deficient number, since it is larger than the sum of its proper divisors (1).

638359 is an equidigital number, since it uses as much as digits as its factorization.

638359 is an odious number, because the sum of its binary digits is odd.

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

The square root of 638359 is about 798.9737167141. The cubic root of 638359 is about 86.1036698237.

The spelling of 638359 in words is "six hundred thirty-eight thousand, three hundred fifty-nine".