597661 has 8 divisors (see below), whose sum is σ = 636120. Its totient is φ = 560448.

The previous prime is 597659. The next prime is 597671. The reversal of 597661 is 166795.

It can be written as a sum of positive squares in 4 ways, for example, as 86436 + 511225 = 294^2 + 715^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 597661 - 2¹ = 597659 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 (597671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 795 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (79515).

2⁵⁹⁷⁶⁶¹ is an apocalyptic number.

It is an amenable number.

597661 is a deficient number, since it is larger than the sum of its proper divisors (38459).

597661 is a wasteful number, since it uses less digits than its factorization.

597661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623.

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

The square root of 597661 is about 773.0853769151. The cubic root of 597661 is about 84.2335244135.

The spelling of 597661 in words is "five hundred ninety-seven thousand, six hundred sixty-one".