3981908417 has 2 divisors, whose sum is σ = 3981908418. Its totient is φ = 3981908416.

The previous prime is 3981908387. The next prime is 3981908471. The reversal of 3981908417 is 7148091893.

Together with next prime (3981908471) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3580346896 + 401561521 = 59836^2 + 20039^2 .

It is a cyclic number.

It is not a de Polignac number, because 3981908417 - 2³⁰ = 2908166593 is a prime.

It is not a weakly prime, because it can be changed into another prime (3981908477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990954208 + 1990954209.

It is an arithmetic number, because the mean of its divisors is an integer number (1990954209).

Almost surely, 2^3981908417 is an apocalyptic number.

It is an amenable number.

3981908417 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981908417 is an equidigital number, since it uses as much as digits as its factorization.

3981908417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 3981908417 is about 63102.3645911942. The cubic root of 3981908417 is about 1585.0042182946.

The spelling of 3981908417 in words is "three billion, nine hundred eighty-one million, nine hundred eight thousand, four hundred seventeen".