3945747 has 8 divisors (see below), whose sum is σ = 5665744. Its totient is φ = 2428128.

The previous prime is 3945731. The next prime is 3945757. The reversal of 3945747 is 7475493.

3945747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3945747 - 2⁴ = 3945731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 101173 = 3945747 / (3 + 9 + 4 + 5 + 7 + 4 + 7).

It is a d-powerful number, because it can be written as 3¹⁰ + 9⁵ + 4 + 5⁹ + 7⁴ + 4¹⁰ + 7⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3945727) 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 7 ways as a sum of consecutive naturals, for example, 50548 + ... + 50625.

It is an arithmetic number, because the mean of its divisors is an integer number (708218).

Almost surely, 2^3945747 is an apocalyptic number.

3945747 is a deficient number, since it is larger than the sum of its proper divisors (1719997).

3945747 is a wasteful number, since it uses less digits than its factorization.

3945747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101189.

The product of its digits is 105840, while the sum is 39.

The square root of 3945747 is about 1986.3904450032. The cubic root of 3945747 is about 158.0191586019.

The spelling of 3945747 in words is "three million, nine hundred forty-five thousand, seven hundred forty-seven".