655439 has 2 divisors, whose sum is σ = 655440. Its totient is φ = 655438.

The previous prime is 655399. The next prime is 655453. The reversal of 655439 is 934556.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 655439 - 2¹⁶ = 589903 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (655489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327719 + 327720.

It is an arithmetic number, because the mean of its divisors is an integer number (327720).

2⁶⁵⁵⁴³⁹ is an apocalyptic number.

655439 is a deficient number, since it is larger than the sum of its proper divisors (1).

655439 is an equidigital number, since it uses as much as digits as its factorization.

655439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 32.

The square root of 655439 is about 809.5918724888. The cubic root of 655439 is about 86.8648538088.

The spelling of 655439 in words is "six hundred fifty-five thousand, four hundred thirty-nine".