654439 has 2 divisors, whose sum is σ = 654440. Its totient is φ = 654438.

The previous prime is 654427. The next prime is 654491. The reversal of 654439 is 934456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 654439 - 2⁹ = 653927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 654439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327219 + 327220.

It is an arithmetic number, because the mean of its divisors is an integer number (327220).

2⁶⁵⁴⁴³⁹ is an apocalyptic number.

654439 is a deficient number, since it is larger than the sum of its proper divisors (1).

654439 is an equidigital number, since it uses as much as digits as its factorization.

654439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 654439 is about 808.9740416107. The cubic root of 654439 is about 86.8206548990.

It can be divided in two parts, 6 and 54439, that added together give a palindrome (54445).

The spelling of 654439 in words is "six hundred fifty-four thousand, four hundred thirty-nine".