321089 has 4 divisors (see below), whose sum is σ = 322224. Its totient is φ = 319956.

The previous prime is 321077. The next prime is 321091. The reversal of 321089 is 980123.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 980123 = 167 ⋅5869.

It is a cyclic number.

It is not a de Polignac number, because 321089 - 2⁴ = 321073 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321089.

It is not an unprimeable number, because it can be changed into a prime (321289) 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, 254 + ... + 840.

It is an arithmetic number, because the mean of its divisors is an integer number (80556).

2³²¹⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

321089 is a deficient number, since it is larger than the sum of its proper divisors (1135).

321089 is an equidigital number, since it uses as much as digits as its factorization.

321089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 321089 is about 566.6471565269. The cubic root of 321089 is about 68.4765401753.

The spelling of 321089 in words is "three hundred twenty-one thousand, eighty-nine".