323981 has 8 divisors (see below), whose sum is σ = 382464. Its totient is φ = 268560.

The previous prime is 323957. The next prime is 323987. The reversal of 323981 is 189323.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 323981 - 2¹⁸ = 61837 is a prime.

It is a super-2 number, since 2×323981² = 209927376722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 323981.

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 323981.

It is not an unprimeable number, because it can be changed into a prime (323987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530 + ... + 963.

It is an arithmetic number, because the mean of its divisors is an integer number (47808).

2³²³⁹⁸¹ is an apocalyptic number.

323981 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

323981 is a deficient number, since it is larger than the sum of its proper divisors (58483).

323981 is a wasteful number, since it uses less digits than its factorization.

323981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1531.

The product of its digits is 1296, while the sum is 26.

The square root of 323981 is about 569.1932887869. The cubic root of 323981 is about 68.6815119609.

The spelling of 323981 in words is "three hundred twenty-three thousand, nine hundred eighty-one".