4944937981 has 2 divisors, whose sum is σ = 4944937982. Its totient is φ = 4944937980.

The previous prime is 4944937939. The next prime is 4944937993. The reversal of 4944937981 is 1897394494.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2587349956 + 2357588025 = 50866^2 + 48555^2 .

It is a cyclic number.

It is not a de Polignac number, because 4944937981 - 2¹⁵ = 4944905213 is a prime.

It is a super-2 number, since 2×4944937981² = 48904823271872712722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4944937931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2472468990 + 2472468991.

It is an arithmetic number, because the mean of its divisors is an integer number (2472468991).

Almost surely, 2^4944937981 is an apocalyptic number.

It is an amenable number.

4944937981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4944937981 is an equidigital number, since it uses as much as digits as its factorization.

4944937981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 58.

The square root of 4944937981 is about 70320.2529930034. The cubic root of 4944937981 is about 1703.6757812410.

The spelling of 4944937981 in words is "four billion, nine hundred forty-four million, nine hundred thirty-seven thousand, nine hundred eighty-one".