2973205981 has 2 divisors, whose sum is σ = 2973205982. Its totient is φ = 2973205980.

The previous prime is 2973205957. The next prime is 2973205993. The reversal of 2973205981 is 1895023792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2575562500 + 397643481 = 50750^2 + 19941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2973205981 is a prime.

It is a super-2 number, since 2×2973205981² = 17679907610908344722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2973205951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1486602990 + 1486602991.

It is an arithmetic number, because the mean of its divisors is an integer number (1486602991).

Almost surely, 2^2973205981 is an apocalyptic number.

It is an amenable number.

2973205981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2973205981 is an equidigital number, since it uses as much as digits as its factorization.

2973205981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 2973205981 is about 54527.1123478953. The cubic root of 2973205981 is about 1437.9429832837.

The spelling of 2973205981 in words is "two billion, nine hundred seventy-three million, two hundred five thousand, nine hundred eighty-one".