5005109981 has 2 divisors, whose sum is σ = 5005109982. Its totient is φ = 5005109980.

The previous prime is 5005109959. The next prime is 5005110013. The reversal of 5005109981 is 1899015005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3313844356 + 1691265625 = 57566^2 + 41125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5005109981 is a prime.

It is a super-2 number, since 2×5005109981² = 50102251843811640722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5005109951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2502554990 + 2502554991.

It is an arithmetic number, because the mean of its divisors is an integer number (2502554991).

Almost surely, 2^5005109981 is an apocalyptic number.

It is an amenable number.

5005109981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5005109981 is an equidigital number, since it uses as much as digits as its factorization.

5005109981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 5005109981 is about 70746.8019135848. The cubic root of 5005109981 is about 1710.5582779815.

The spelling of 5005109981 in words is "five billion, five million, one hundred nine thousand, nine hundred eighty-one".