577985 has 4 divisors (see below), whose sum is σ = 693588. Its totient is φ = 462384.

The previous prime is 577981. The next prime is 578021. The reversal of 577985 is 589775.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 425104 + 152881 = 652^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 577985 - 2² = 577981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (577981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57794 + ... + 57803.

It is an arithmetic number, because the mean of its divisors is an integer number (173397).

2⁵⁷⁷⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

577985 is a deficient number, since it is larger than the sum of its proper divisors (115603).

577985 is a wasteful number, since it uses less digits than its factorization.

577985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115602.

The product of its digits is 88200, while the sum is 41.

The square root of 577985 is about 760.2532472801. The cubic root of 577985 is about 83.2988212645.

The spelling of 577985 in words is "five hundred seventy-seven thousand, nine hundred eighty-five".