3978307 has 4 divisors (see below), whose sum is σ = 4115520. Its totient is φ = 3841096.

The previous prime is 3978301. The next prime is 3978329. The reversal of 3978307 is 7038793.

3978307 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.

It is a cyclic number.

It is not a de Polignac number, because 3978307 - 2⁷ = 3978179 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3978301) 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, 68563 + ... + 68620.

It is an arithmetic number, because the mean of its divisors is an integer number (1028880).

Almost surely, 2^3978307 is an apocalyptic number.

3978307 is a deficient number, since it is larger than the sum of its proper divisors (137213).

3978307 is a wasteful number, since it uses less digits than its factorization.

3978307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137212.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 3978307 is about 1994.5693770837. The cubic root of 3978307 is about 158.4526224467.

The spelling of 3978307 in words is "three million, nine hundred seventy-eight thousand, three hundred seven".