3905378509 has 8 divisors (see below), whose sum is σ = 3959343360. Its totient is φ = 3851527056.

The previous prime is 3905378461. The next prime is 3905378513. The reversal of 3905378509 is 9058735093.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3905378509 - 2⁷ = 3905378381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3905378569) 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 7 ways as a sum of consecutive naturals, for example, 42207 + ... + 97939.

It is an arithmetic number, because the mean of its divisors is an integer number (494917920).

Almost surely, 2^3905378509 is an apocalyptic number.

It is an amenable number.

3905378509 is a deficient number, since it is larger than the sum of its proper divisors (53964851).

3905378509 is an equidigital number, since it uses as much as digits as its factorization.

3905378509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56699.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The square root of 3905378509 is about 62493.0276830944. The cubic root of 3905378509 is about 1574.7841826063.

The spelling of 3905378509 in words is "three billion, nine hundred five million, three hundred seventy-eight thousand, five hundred nine".