654839 has 2 divisors, whose sum is σ = 654840. Its totient is φ = 654838.

The previous prime is 654827. The next prime is 654853. The reversal of 654839 is 938456.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 654799 and 654808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327419 + 327420.

It is an arithmetic number, because the mean of its divisors is an integer number (327420).

2⁶⁵⁴⁸³⁹ is an apocalyptic number.

654839 is a deficient number, since it is larger than the sum of its proper divisors (1).

654839 is an equidigital number, since it uses as much as digits as its factorization.

654839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 654839 is about 809.2212305668. The cubic root of 654839 is about 86.8383398622.

It can be divided in two parts, 6 and 54839, that added together give a palindrome (54845).

The spelling of 654839 in words is "six hundred fifty-four thousand, eight hundred thirty-nine".