578647 has 2 divisors, whose sum is σ = 578648. Its totient is φ = 578646.

The previous prime is 578621. The next prime is 578659. The reversal of 578647 is 746875.

It is a happy number.

578647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-578647 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 (578687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289323 + 289324.

It is an arithmetic number, because the mean of its divisors is an integer number (289324).

2⁵⁷⁸⁶⁴⁷ is an apocalyptic number.

578647 is a deficient number, since it is larger than the sum of its proper divisors (1).

578647 is an equidigital number, since it uses as much as digits as its factorization.

578647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 37.

The square root of 578647 is about 760.6885039226. The cubic root of 578647 is about 83.3306114667.

It can be divided in two parts, 578 and 647, that added together give a triangular number (1225 = T₄₉).

The spelling of 578647 in words is "five hundred seventy-eight thousand, six hundred forty-seven".