579661 has 4 divisors (see below), whose sum is σ = 590652. Its totient is φ = 568672.

The previous prime is 579653. The next prime is 579673. The reversal of 579661 is 166975.

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 498436 + 81225 = 706^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 579661 - 2³ = 579653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (579611) 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, 5416 + ... + 5521.

It is an arithmetic number, because the mean of its divisors is an integer number (147663).

2⁵⁷⁹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

579661 is a deficient number, since it is larger than the sum of its proper divisors (10991).

579661 is a wasteful number, since it uses less digits than its factorization.

579661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10990.

The product of its digits is 11340, while the sum is 34.

The square root of 579661 is about 761.3547136519. The cubic root of 579661 is about 83.3792582417.

Subtracting from 579661 its reverse (166975), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 579661 in words is "five hundred seventy-nine thousand, six hundred sixty-one".