3947133 has 4 divisors (see below), whose sum is σ = 5262848. Its totient is φ = 2631420.

The previous prime is 3947131. The next prime is 3947143. The reversal of 3947133 is 3317493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3947133 - 2¹ = 3947131 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3947133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3947131) 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, 657853 + ... + 657858.

It is an arithmetic number, because the mean of its divisors is an integer number (1315712).

Almost surely, 2^3947133 is an apocalyptic number.

It is an amenable number.

3947133 is a deficient number, since it is larger than the sum of its proper divisors (1315715).

3947133 is a wasteful number, since it uses less digits than its factorization.

3947133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315714.

The product of its digits is 6804, while the sum is 30.

The square root of 3947133 is about 1986.7392883818. The cubic root of 3947133 is about 158.0376585982.

It can be divided in two parts, 394713 and 3, that added together give a triangular number (394716 = T₈₈₈).

The spelling of 3947133 in words is "three million, nine hundred forty-seven thousand, one hundred thirty-three".