3726323981 has 2 divisors, whose sum is σ = 3726323982. Its totient is φ = 3726323980.

The previous prime is 3726323963. The next prime is 3726323987. The reversal of 3726323981 is 1893236273.

3726323981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2139895081 + 1586428900 = 46259^2 + 39830^2 .

It is an emirp because it is prime and its reverse (1893236273) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3726323981 is a prime.

It is a super-2 number, since 2×3726323981² = 27770980822751376722, 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 (3726323987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1863161990 + 1863161991.

It is an arithmetic number, because the mean of its divisors is an integer number (1863161991).

Almost surely, 2^3726323981 is an apocalyptic number.

It is an amenable number.

3726323981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3726323981 is an equidigital number, since it uses as much as digits as its factorization.

3726323981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 44.

The square root of 3726323981 is about 61043.6235900196. The cubic root of 3726323981 is about 1550.3397078521.

The spelling of 3726323981 in words is "three billion, seven hundred twenty-six million, three hundred twenty-three thousand, nine hundred eighty-one".