4638589 has 2 divisors, whose sum is σ = 4638590. Its totient is φ = 4638588.

The previous prime is 4638587. The next prime is 4638607. The reversal of 4638589 is 9858364.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4235364 + 403225 = 2058^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 4638589 - 2¹ = 4638587 is a prime.

It is a super-3 number, since 3×4638589³ (a number of 21 digits) contains 333 as substring.

Together with 4638587, it forms a pair of twin primes.

It is an Ulam number.

4638589 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4638583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2319294 + 2319295.

It is an arithmetic number, because the mean of its divisors is an integer number (2319295).

Almost surely, 2^4638589 is an apocalyptic number.

It is an amenable number.

4638589 is a deficient number, since it is larger than the sum of its proper divisors (1).

4638589 is an equidigital number, since it uses as much as digits as its factorization.

4638589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 4638589 is about 2153.7383777980. The cubic root of 4638589 is about 166.7741098320.

The spelling of 4638589 in words is "four million, six hundred thirty-eight thousand, five hundred eighty-nine".