326381 has 4 divisors (see below), whose sum is σ = 356064. Its totient is φ = 296700.

The previous prime is 326369. The next prime is 326437. The reversal of 326381 is 183623.

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 an emirpimes, since its reverse is a distinct semiprime: 183623 = 11 ⋅16693.

It is a cyclic number.

It is not a de Polignac number, because 326381 - 2¹⁸ = 64237 is a prime.

It is a super-2 number, since 2×326381² = 213049114322, 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 (326351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14825 + ... + 14846.

It is an arithmetic number, because the mean of its divisors is an integer number (89016).

2³²⁶³⁸¹ is an apocalyptic number.

It is an amenable number.

326381 is a deficient number, since it is larger than the sum of its proper divisors (29683).

326381 is a wasteful number, since it uses less digits than its factorization.

326381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29682.

The product of its digits is 864, while the sum is 23.

The square root of 326381 is about 571.2976457154. The cubic root of 326381 is about 68.8506888263.

It can be divided in two parts, 326 and 381, that added together give a palindrome (707).

The spelling of 326381 in words is "three hundred twenty-six thousand, three hundred eighty-one".