323621 has 4 divisors (see below), whose sum is σ = 326700. Its totient is φ = 320544.

The previous prime is 323599. The next prime is 323623. The reversal of 323621 is 126323.

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 83521 + 240100 = 289^2 + 490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-323621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 323621.

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 323621.

It is not an unprimeable number, because it can be changed into a prime (323623) 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, 1376 + ... + 1593.

It is an arithmetic number, because the mean of its divisors is an integer number (81675).

2³²³⁶²¹ is an apocalyptic number.

It is an amenable number.

323621 is a deficient number, since it is larger than the sum of its proper divisors (3079).

323621 is a wasteful number, since it uses less digits than its factorization.

323621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3078.

The product of its digits is 216, while the sum is 17.

The square root of 323621 is about 568.8769638507. The cubic root of 323621 is about 68.6560634438.

Adding to 323621 its reverse (126323), we get a palindrome (449944).

The spelling of 323621 in words is "three hundred twenty-three thousand, six hundred twenty-one".