3993747 has 4 divisors (see below), whose sum is σ = 5325000. Its totient is φ = 2662496.

The previous prime is 3993739. The next prime is 3993751. The reversal of 3993747 is 7473993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7473993 = 3 ⋅2491331.

It is a cyclic number.

It is not a de Polignac number, because 3993747 - 2³ = 3993739 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 3993699 and 3993708.

It is not an unprimeable number, because it can be changed into a prime (3993247) 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, 665622 + ... + 665627.

It is an arithmetic number, because the mean of its divisors is an integer number (1331250).

Almost surely, 2^3993747 is an apocalyptic number.

3993747 is a deficient number, since it is larger than the sum of its proper divisors (1331253).

3993747 is a wasteful number, since it uses less digits than its factorization.

3993747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331252.

The product of its digits is 142884, while the sum is 42.

The square root of 3993747 is about 1998.4361385844. The cubic root of 3993747 is about 158.6573452338.

The spelling of 3993747 in words is "three million, nine hundred ninety-three thousand, seven hundred forty-seven".