3947793 has 4 divisors (see below), whose sum is σ = 5263728. Its totient is φ = 2631860.

The previous prime is 3947771. The next prime is 3947807. The reversal of 3947793 is 3977493.

3947793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3947793 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3947753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657963 + ... + 657968.

It is an arithmetic number, because the mean of its divisors is an integer number (1315932).

Almost surely, 2^3947793 is an apocalyptic number.

It is an amenable number.

3947793 is a deficient number, since it is larger than the sum of its proper divisors (1315935).

3947793 is a wasteful number, since it uses less digits than its factorization.

3947793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1315934.

The product of its digits is 142884, while the sum is 42.

The square root of 3947793 is about 1986.9053827498. The cubic root of 3947793 is about 158.0464665981.

The spelling of 3947793 in words is "three million, nine hundred forty-seven thousand, seven hundred ninety-three".