323639 has 4 divisors (see below), whose sum is σ = 332424. Its totient is φ = 314856.

The previous prime is 323623. The next prime is 323641. The reversal of 323639 is 936323.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 323639 - 2⁴ = 323623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 323639.

It is not an unprimeable number, because it can be changed into a prime (323699) 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, 4337 + ... + 4410.

It is an arithmetic number, because the mean of its divisors is an integer number (83106).

2³²³⁶³⁹ is an apocalyptic number.

323639 is a deficient number, since it is larger than the sum of its proper divisors (8785).

323639 is an equidigital number, since it uses as much as digits as its factorization.

323639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8784.

The product of its digits is 2916, while the sum is 26.

The square root of 323639 is about 568.8927842749. The cubic root of 323639 is about 68.6573363177.

The spelling of 323639 in words is "three hundred twenty-three thousand, six hundred thirty-nine".