2943065981 has 2 divisors, whose sum is σ = 2943065982. Its totient is φ = 2943065980.

The previous prime is 2943065929. The next prime is 2943065989. The reversal of 2943065981 is 1895603492.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2943062500 + 3481 = 54250^2 + 59^2 .

It is a cyclic number.

It is not a de Polignac number, because 2943065981 - 2¹⁸ = 2942803837 is a prime.

It is a super-2 number, since 2×2943065981² = 17323274737038984722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2943065989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1471532990 + 1471532991.

It is an arithmetic number, because the mean of its divisors is an integer number (1471532991).

Almost surely, 2^2943065981 is an apocalyptic number.

It is an amenable number.

2943065981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2943065981 is an equidigital number, since it uses as much as digits as its factorization.

2943065981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 2943065981 is about 54250.0320829398. The cubic root of 2943065981 is about 1433.0675637700.

The spelling of 2943065981 in words is "two billion, nine hundred forty-three million, sixty-five thousand, nine hundred eighty-one".