3943913 has 16 divisors (see below), whose sum is σ = 4354560. Its totient is φ = 3561600.

The previous prime is 3943883. The next prime is 3943921. The reversal of 3943913 is 3193493.

It is a cyclic number.

It is not a de Polignac number, because 3943913 - 2¹⁰ = 3942889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3943913.

It is not an unprimeable number, because it can be changed into a prime (3943993) 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 15 ways as a sum of consecutive naturals, for example, 36806 + ... + 36912.

It is an arithmetic number, because the mean of its divisors is an integer number (272160).

Almost surely, 2^3943913 is an apocalyptic number.

It is an amenable number.

3943913 is a deficient number, since it is larger than the sum of its proper divisors (410647).

3943913 is a wasteful number, since it uses less digits than its factorization.

3943913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208.

The product of its digits is 8748, while the sum is 32.

The square root of 3943913 is about 1985.9287499807. The cubic root of 3943913 is about 157.9946721485.

The spelling of 3943913 in words is "three million, nine hundred forty-three thousand, nine hundred thirteen".