2956838981 has 2 divisors, whose sum is σ = 2956838982. Its totient is φ = 2956838980.

The previous prime is 2956838977. The next prime is 2956839001. The reversal of 2956838981 is 1898386592.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2057438881 + 899400100 = 45359^2 + 29990^2 .

It is a cyclic number.

It is not a de Polignac number, because 2956838981 - 2² = 2956838977 is a prime.

It is a super-2 number, since 2×2956838981² = 17485793519122236722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2956838981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2956838281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1478419490 + 1478419491.

It is an arithmetic number, because the mean of its divisors is an integer number (1478419491).

Almost surely, 2^2956838981 is an apocalyptic number.

It is an amenable number.

2956838981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2956838981 is an equidigital number, since it uses as much as digits as its factorization.

2956838981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 59.

The square root of 2956838981 is about 54376.8239326278. The cubic root of 2956838981 is about 1435.2995818981.

The spelling of 2956838981 in words is "two billion, nine hundred fifty-six million, eight hundred thirty-eight thousand, nine hundred eighty-one".