578689 has 2 divisors, whose sum is σ = 578690. Its totient is φ = 578688.

The previous prime is 578687. The next prime is 578693. The reversal of 578689 is 986875.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 577600 + 1089 = 760^2 + 33^2 .

It is a cyclic number.

It is not a de Polignac number, because 578689 - 2¹ = 578687 is a prime.

Together with 578687, it forms a pair of twin primes.

It is an Ulam number.

It is a d-powerful number, because it can be written as 5⁶ + 7⁵ + 6⁷ + 8⁴ + 8⁶ + 9² .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (578687) 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, 289344 + 289345.

It is an arithmetic number, because the mean of its divisors is an integer number (289345).

2⁵⁷⁸⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

578689 is a deficient number, since it is larger than the sum of its proper divisors (1).

578689 is an equidigital number, since it uses as much as digits as its factorization.

578689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 578689 is about 760.7161099911. The cubic root of 578689 is about 83.3326275496.

The spelling of 578689 in words is "five hundred seventy-eight thousand, six hundred eighty-nine".