323320981 has 2 divisors, whose sum is σ = 323320982. Its totient is φ = 323320980.

The previous prime is 323320927. The next prime is 323321023. The reversal of 323320981 is 189023323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 162792081 + 160528900 = 12759^2 + 12670^2 .

It is a cyclic number.

It is not a de Polignac number, because 323320981 - 2¹³ = 323312789 is a prime.

It is a super-2 number, since 2×323320981² = 209072913509604722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323320901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161660490 + 161660491.

It is an arithmetic number, because the mean of its divisors is an integer number (161660491).

Almost surely, 2^323320981 is an apocalyptic number.

It is an amenable number.

323320981 is a deficient number, since it is larger than the sum of its proper divisors (1).

323320981 is an equidigital number, since it uses as much as digits as its factorization.

323320981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 323320981 is about 17981.1284684805. The cubic root of 323320981 is about 686.3484058117.

The spelling of 323320981 in words is "three hundred twenty-three million, three hundred twenty thousand, nine hundred eighty-one".