4105387981 has 2 divisors, whose sum is σ = 4105387982. Its totient is φ = 4105387980.

The previous prime is 4105387963. The next prime is 4105387999. The reversal of 4105387981 is 1897835014.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (4105387963) and next prime (4105387999).

It can be written as a sum of positive squares in only one way, i.e., 3811951081 + 293436900 = 61741^2 + 17130^2 .

It is a cyclic number.

It is not a de Polignac number, because 4105387981 - 2⁹ = 4105387469 is a prime.

It is a super-2 number, since 2×4105387981² = 33708420949078512722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4105387961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2052693990 + 2052693991.

It is an arithmetic number, because the mean of its divisors is an integer number (2052693991).

Almost surely, 2^4105387981 is an apocalyptic number.

It is an amenable number.

4105387981 is a deficient number, since it is larger than the sum of its proper divisors (1).

4105387981 is an equidigital number, since it uses as much as digits as its factorization.

4105387981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 4105387981 is about 64073.3016239994. The cubic root of 4105387981 is about 1601.2214606433.

The spelling of 4105387981 in words is "four billion, one hundred five million, three hundred eighty-seven thousand, nine hundred eighty-one".