3971947 has 8 divisors (see below), whose sum is σ = 4582656. Its totient is φ = 3372072.

The previous prime is 3971917. The next prime is 3971963. The reversal of 3971947 is 7491793.

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

It is a cyclic number.

It is not a de Polignac number, because 3971947 - 2¹¹ = 3969899 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3971917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1903 + ... + 3400.

It is an arithmetic number, because the mean of its divisors is an integer number (572832).

Almost surely, 2^3971947 is an apocalyptic number.

3971947 is a deficient number, since it is larger than the sum of its proper divisors (610709).

3971947 is a wasteful number, since it uses less digits than its factorization.

3971947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5417.

The product of its digits is 47628, while the sum is 40.

The square root of 3971947 is about 1992.9744102722. The cubic root of 3971947 is about 158.3681395933.

The spelling of 3971947 in words is "three million, nine hundred seventy-one thousand, nine hundred forty-seven".