3913905 has 32 divisors (see below), whose sum is σ = 6819840. Its totient is φ = 1909440.

The previous prime is 3913837. The next prime is 3913907. The reversal of 3913905 is 5093193.

It is not a de Polignac number, because 3913905 - 2¹⁴ = 3897521 is a prime.

3913905 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3913907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8614 + ... + 9056.

It is an arithmetic number, because the mean of its divisors is an integer number (213120).

Almost surely, 2^3913905 is an apocalyptic number.

It is an amenable number.

3913905 is a deficient number, since it is larger than the sum of its proper divisors (2905935).

3913905 is a wasteful number, since it uses less digits than its factorization.

3913905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501.

The product of its (nonzero) digits is 3645, while the sum is 30.

The square root of 3913905 is about 1978.3591686041. The cubic root of 3913905 is about 157.5929408615.

The spelling of 3913905 in words is "three million, nine hundred thirteen thousand, nine hundred five".