332009981 has 2 divisors, whose sum is σ = 332009982. Its totient is φ = 332009980.

The previous prime is 332009963. The next prime is 332009989. The reversal of 332009981 is 189900233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233325625 + 98684356 = 15275^2 + 9934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-332009981 is a prime.

It is a super-2 number, since 2×332009981² = 220461254967240722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (332009989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166004990 + 166004991.

It is an arithmetic number, because the mean of its divisors is an integer number (166004991).

Almost surely, 2^332009981 is an apocalyptic number.

It is an amenable number.

332009981 is a deficient number, since it is larger than the sum of its proper divisors (1).

332009981 is an equidigital number, since it uses as much as digits as its factorization.

332009981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 332009981 is about 18221.1410454999. The cubic root of 332009981 is about 692.4424961483.

The spelling of 332009981 in words is "three hundred thirty-two million, nine thousand, nine hundred eighty-one".