332999981 has 2 divisors, whose sum is σ = 332999982. Its totient is φ = 332999980.

The previous prime is 332999977. The next prime is 333000001. The reversal of 332999981 is 189999233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 265201225 + 67798756 = 16285^2 + 8234^2 .

It is a cyclic number.

It is not a de Polignac number, because 332999981 - 2² = 332999977 is a prime.

It is a super-2 number, since 2×332999981² = 221777974692000722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (332996981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166499990 + 166499991.

It is an arithmetic number, because the mean of its divisors is an integer number (166499991).

Almost surely, 2^332999981 is an apocalyptic number.

It is an amenable number.

332999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

332999981 is an equidigital number, since it uses as much as digits as its factorization.

332999981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 944784, while the sum is 53.

The square root of 332999981 is about 18248.2870702979. The cubic root of 332999981 is about 693.1300636602.

The spelling of 332999981 in words is "three hundred thirty-two million, nine hundred ninety-nine thousand, nine hundred eighty-one".