328762981 has 2 divisors, whose sum is σ = 328762982. Its totient is φ = 328762980.

The previous prime is 328762933. The next prime is 328762999. The reversal of 328762981 is 189267823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288694081 + 40068900 = 16991^2 + 6330^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328762981 is a prime.

It is a super-2 number, since 2×328762981² = 216170195352012722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328762081) 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, 164381490 + 164381491.

It is an arithmetic number, because the mean of its divisors is an integer number (164381491).

Almost surely, 2^328762981 is an apocalyptic number.

It is an amenable number.

328762981 is a deficient number, since it is larger than the sum of its proper divisors (1).

328762981 is an equidigital number, since it uses as much as digits as its factorization.

328762981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 328762981 is about 18131.8223298156. The cubic root of 328762981 is about 690.1777746793.

The spelling of 328762981 in words is "three hundred twenty-eight million, seven hundred sixty-two thousand, nine hundred eighty-one".