3978193 has 4 divisors (see below), whose sum is σ = 4045680. Its totient is φ = 3910708.

The previous prime is 3978181. The next prime is 3978197. The reversal of 3978193 is 3918793.

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 not a de Polignac number, because 3978193 - 2⁹ = 3977681 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3978197) 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 3 ways as a sum of consecutive naturals, for example, 33655 + ... + 33772.

It is an arithmetic number, because the mean of its divisors is an integer number (1011420).

Almost surely, 2^3978193 is an apocalyptic number.

It is an amenable number.

3978193 is a deficient number, since it is larger than the sum of its proper divisors (67487).

3978193 is an equidigital number, since it uses as much as digits as its factorization.

3978193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67486.

The product of its digits is 40824, while the sum is 40.

The square root of 3978193 is about 1994.5407992819. The cubic root of 3978193 is about 158.4511089242.

The spelling of 3978193 in words is "three million, nine hundred seventy-eight thousand, one hundred ninety-three".