323661 has 16 divisors (see below), whose sum is σ = 478016. Its totient is φ = 193536.

The previous prime is 323651. The next prime is 323699. The reversal of 323661 is 166323.

It is not a de Polignac number, because 323661 - 2⁶ = 323597 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1581 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (29876).

2³²³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

323661 is a deficient number, since it is larger than the sum of its proper divisors (154355).

323661 is a wasteful number, since it uses less digits than its factorization.

323661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252.

The product of its digits is 648, while the sum is 21.

The square root of 323661 is about 568.9121197514. The cubic root of 323661 is about 68.6588919885.

Adding to 323661 its reverse (166323), we get a palindrome (489984).

The spelling of 323661 in words is "three hundred twenty-three thousand, six hundred sixty-one".