3947471 has 4 divisors (see below), whose sum is σ = 4306344. Its totient is φ = 3588600.

The previous prime is 3947453. The next prime is 3947473. The reversal of 3947471 is 1747493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1747493 = 11 ⋅158863.

It is a cyclic number.

It is not a de Polignac number, because 3947471 - 2⁶ = 3947407 is a prime.

It is a super-3 number, since 3×3947471³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179420 + ... + 179441.

It is an arithmetic number, because the mean of its divisors is an integer number (1076586).

Almost surely, 2^3947471 is an apocalyptic number.

3947471 is a deficient number, since it is larger than the sum of its proper divisors (358873).

3947471 is a wasteful number, since it uses less digits than its factorization.

3947471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358872.

The product of its digits is 21168, while the sum is 35.

The square root of 3947471 is about 1986.8243505655. The cubic root of 3947471 is about 158.0421694844.

The spelling of 3947471 in words is "three million, nine hundred forty-seven thousand, four hundred seventy-one".