3978347 has 4 divisors (see below), whose sum is σ = 3983496. Its totient is φ = 3973200.

The previous prime is 3978329. The next prime is 3978349. The reversal of 3978347 is 7438793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3978347 - 2⁶ = 3978283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3978349) 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, 1154 + ... + 3047.

It is an arithmetic number, because the mean of its divisors is an integer number (995874).

Almost surely, 2^3978347 is an apocalyptic number.

3978347 is a deficient number, since it is larger than the sum of its proper divisors (5149).

3978347 is an equidigital number, since it uses as much as digits as its factorization.

3978347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5148.

The product of its digits is 127008, while the sum is 41.

The square root of 3978347 is about 1994.5794042855. The cubic root of 3978347 is about 158.4531535004.

The spelling of 3978347 in words is "three million, nine hundred seventy-eight thousand, three hundred forty-seven".