330748981 has 2 divisors, whose sum is σ = 330748982. Its totient is φ = 330748980.

The previous prime is 330748961. The next prime is 330749047. The reversal of 330748981 is 189847033.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 330694225 + 54756 = 18185^2 + 234^2 .

It is a cyclic number.

It is not a de Polignac number, because 330748981 - 2⁹ = 330748469 is a prime.

It is a super-2 number, since 2×330748981² = 218789776865076722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (330748961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165374490 + 165374491.

It is an arithmetic number, because the mean of its divisors is an integer number (165374491).

Almost surely, 2^330748981 is an apocalyptic number.

It is an amenable number.

330748981 is a deficient number, since it is larger than the sum of its proper divisors (1).

330748981 is an equidigital number, since it uses as much as digits as its factorization.

330748981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 330748981 is about 18186.5054642171. The cubic root of 330748981 is about 691.5647335987.

The spelling of 330748981 in words is "three hundred thirty million, seven hundred forty-eight thousand, nine hundred eighty-one".