488639 has 2 divisors, whose sum is σ = 488640. Its totient is φ = 488638.

The previous prime is 488633. The next prime is 488641. The reversal of 488639 is 936884.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 488639 - 2¹² = 484543 is a prime.

Together with 488641, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (488633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244319 + 244320.

It is an arithmetic number, because the mean of its divisors is an integer number (244320).

2⁴⁸⁸⁶³⁹ is an apocalyptic number.

488639 is a deficient number, since it is larger than the sum of its proper divisors (1).

488639 is an equidigital number, since it uses as much as digits as its factorization.

488639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 488639 is about 699.0271811596. The cubic root of 488639 is about 78.7642923585.

Subtracting from 488639 its sum of digits (38), we obtain a square (488601 = 699²).

The spelling of 488639 in words is "four hundred eighty-eight thousand, six hundred thirty-nine".