326399 has 4 divisors (see below), whose sum is σ = 336960. Its totient is φ = 315840.

The previous prime is 326369. The next prime is 326437. The reversal of 326399 is 993623.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993623 = 23 ⋅43201.

It is a cyclic number.

It is not a de Polignac number, because 326399 - 2⁸ = 326143 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326309) 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, 5234 + ... + 5295.

It is an arithmetic number, because the mean of its divisors is an integer number (84240).

2³²⁶³⁹⁹ is an apocalyptic number.

326399 is a deficient number, since it is larger than the sum of its proper divisors (10561).

326399 is a wasteful number, since it uses less digits than its factorization.

326399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560.

The product of its digits is 8748, while the sum is 32.

The square root of 326399 is about 571.3133991077. The cubic root of 326399 is about 68.8519545144.

It can be divided in two parts, 3 and 26399, that multiplied together give a palindrome (79197).

The spelling of 326399 in words is "three hundred twenty-six thousand, three hundred ninety-nine".