598661 has 4 divisors (see below), whose sum is σ = 684192. Its totient is φ = 513132.

The previous prime is 598657. The next prime is 598669. The reversal of 598661 is 166895.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 598661 - 2² = 598657 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 (598669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42755 + ... + 42768.

It is an arithmetic number, because the mean of its divisors is an integer number (171048).

2⁵⁹⁸⁶⁶¹ is an apocalyptic number.

It is an amenable number.

598661 is a deficient number, since it is larger than the sum of its proper divisors (85531).

598661 is an equidigital number, since it uses as much as digits as its factorization.

598661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85530.

The product of its digits is 12960, while the sum is 35.

The square root of 598661 is about 773.7318657003. The cubic root of 598661 is about 84.2804777803.

The spelling of 598661 in words is "five hundred ninety-eight thousand, six hundred sixty-one".