578861 has 2 divisors, whose sum is σ = 578862. Its totient is φ = 578860.

The previous prime is 578857. The next prime is 578881. The reversal of 578861 is 168875.

It is a happy number.

578861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 570025 + 8836 = 755^2 + 94^2 .

It is a cyclic number.

It is not a de Polignac number, because 578861 - 2² = 578857 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 578861.

It is not a weakly prime, because it can be changed into another prime (578821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289430 + 289431.

It is an arithmetic number, because the mean of its divisors is an integer number (289431).

2⁵⁷⁸⁸⁶¹ is an apocalyptic number.

It is an amenable number.

578861 is a deficient number, since it is larger than the sum of its proper divisors (1).

578861 is an equidigital number, since it uses as much as digits as its factorization.

578861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 35.

The square root of 578861 is about 760.8291529641. The cubic root of 578861 is about 83.3408828716.

The spelling of 578861 in words is "five hundred seventy-eight thousand, eight hundred sixty-one".