326989 has 4 divisors (see below), whose sum is σ = 352156. Its totient is φ = 301824.

The previous prime is 326983. The next prime is 326993. The reversal of 326989 is 989623.

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 108900 + 218089 = 330^2 + 467^2 .

It is a cyclic number.

It is not a de Polignac number, because 326989 - 2¹¹ = 324941 is a prime.

It is a super-2 number, since 2×326989² = 213843612242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326983) 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, 12564 + ... + 12589.

It is an arithmetic number, because the mean of its divisors is an integer number (88039).

2³²⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

326989 is a deficient number, since it is larger than the sum of its proper divisors (25167).

326989 is a wasteful number, since it uses less digits than its factorization.

326989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25166.

The product of its digits is 23328, while the sum is 37.

The square root of 326989 is about 571.8295200495. The cubic root of 326989 is about 68.8934152227.

It can be divided in two parts, 32 and 6989, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 326989 in words is "three hundred twenty-six thousand, nine hundred eighty-nine".