5438639 has 2 divisors, whose sum is σ = 5438640. Its totient is φ = 5438638.

The previous prime is 5438627. The next prime is 5438651. The reversal of 5438639 is 9368345.

It is a balanced prime because it is at equal distance from previous prime (5438627) and next prime (5438651).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5438639 is a prime.

It is a super-3 number, since 3×5438639³ (a number of 21 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5438669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2719319 + 2719320.

It is an arithmetic number, because the mean of its divisors is an integer number (2719320).

Almost surely, 2^5438639 is an apocalyptic number.

5438639 is a deficient number, since it is larger than the sum of its proper divisors (1).

5438639 is an equidigital number, since it uses as much as digits as its factorization.

5438639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 5438639 is about 2332.0889777193. The cubic root of 5438639 is about 175.8585187876.

The spelling of 5438639 in words is "five million, four hundred thirty-eight thousand, six hundred thirty-nine".