3908045813 has 12 divisors (see below), whose sum is σ = 4547112300. Its totient is φ = 3349003392.

The previous prime is 3908045797. The next prime is 3908045821. The reversal of 3908045813 is 3185408093.

It can be written as a sum of positive squares in 2 ways, for example, as 581870884 + 3326174929 = 24122^2 + 57673^2 .

It is not a de Polignac number, because 3908045813 - 2⁴ = 3908045797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3908045863) 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 in 11 ways as a sum of consecutive naturals, for example, 429095 + ... + 438107.

It is an arithmetic number, because the mean of its divisors is an integer number (378926025).

Almost surely, 2^3908045813 is an apocalyptic number.

It is an amenable number.

3908045813 is a deficient number, since it is larger than the sum of its proper divisors (639066487).

3908045813 is an equidigital number, since it uses as much as digits as its factorization.

3908045813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17876 (or 17869 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 3908045813 is about 62514.3648532079. The cubic root of 3908045813 is about 1575.1426175382.

The spelling of 3908045813 in words is "three billion, nine hundred eight million, forty-five thousand, eight hundred thirteen".