3936012581 has 2 divisors, whose sum is σ = 3936012582. Its totient is φ = 3936012580.

The previous prime is 3936012571. The next prime is 3936012593. The reversal of 3936012581 is 1852106393.

It is a happy number.

3936012581 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2617959556 + 1318053025 = 51166^2 + 36305^2 .

It is a cyclic number.

It is not a de Polignac number, because 3936012581 - 2³⁰ = 2862270757 is a prime.

It is a super-2 number, since 2×3936012581² = 30984390075580563122, 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 (3936012551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1968006290 + 1968006291.

It is an arithmetic number, because the mean of its divisors is an integer number (1968006291).

Almost surely, 2^3936012581 is an apocalyptic number.

It is an amenable number.

3936012581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3936012581 is an equidigital number, since it uses as much as digits as its factorization.

3936012581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 3936012581 is about 62737.6488322602. The cubic root of 3936012581 is about 1578.8910368417.

The spelling of 3936012581 in words is "three billion, nine hundred thirty-six million, twelve thousand, five hundred eighty-one".