324947981 has 2 divisors, whose sum is σ = 324947982. Its totient is φ = 324947980.

The previous prime is 324947977. The next prime is 324947993. The reversal of 324947981 is 189749423.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259499881 + 65448100 = 16109^2 + 8090^2 .

It is a cyclic number.

It is not a de Polignac number, because 324947981 - 2² = 324947977 is a prime.

It is a super-2 number, since 2×324947981² = 211182380711952722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (324943981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 162473990 + 162473991.

It is an arithmetic number, because the mean of its divisors is an integer number (162473991).

Almost surely, 2^324947981 is an apocalyptic number.

It is an amenable number.

324947981 is a deficient number, since it is larger than the sum of its proper divisors (1).

324947981 is an equidigital number, since it uses as much as digits as its factorization.

324947981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 47.

The square root of 324947981 is about 18026.3135721090. The cubic root of 324947981 is about 687.4977496786.

The spelling of 324947981 in words is "three hundred twenty-four million, nine hundred forty-seven thousand, nine hundred eighty-one".