4140509981 has 2 divisors, whose sum is σ = 4140509982. Its totient is φ = 4140509980.

The previous prime is 4140509969. The next prime is 4140510013. The reversal of 4140509981 is 1899050414.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3955277881 + 185232100 = 62891^2 + 13610^2 .

It is a cyclic number.

It is not a de Polignac number, because 4140509981 - 2²⁶ = 4073401117 is a prime.

It is a super-2 number, since 2×4140509981² = 34287645805521240722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4140509941) 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, 2070254990 + 2070254991.

It is an arithmetic number, because the mean of its divisors is an integer number (2070254991).

Almost surely, 2^4140509981 is an apocalyptic number.

It is an amenable number.

4140509981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4140509981 is an equidigital number, since it uses as much as digits as its factorization.

4140509981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 4140509981 is about 64346.7946443333. The cubic root of 4140509981 is about 1605.7747033691.

The spelling of 4140509981 in words is "four billion, one hundred forty million, five hundred nine thousand, nine hundred eighty-one".