244639 has 2 divisors, whose sum is σ = 244640. Its totient is φ = 244638.

The previous prime is 244637. The next prime is 244667. The reversal of 244639 is 936442.

It is an a-pointer prime, because the next prime (244667) can be obtained adding 244639 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 244639 - 2¹ = 244637 is a prime.

Together with 244637, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122319 + 122320.

It is an arithmetic number, because the mean of its divisors is an integer number (122320).

2²⁴⁴⁶³⁹ is an apocalyptic number.

244639 is a deficient number, since it is larger than the sum of its proper divisors (1).

244639 is an equidigital number, since it uses as much as digits as its factorization.

244639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 244639 is about 494.6099473322. The cubic root of 244639 is about 62.5424990947.

It can be divided in two parts, 2446 and 39, that added together give a triangular number (2485 = T₇₀).

The spelling of 244639 in words is "two hundred forty-four thousand, six hundred thirty-nine".