3993047 has 4 divisors (see below), whose sum is σ = 4041240. Its totient is φ = 3944856.

The previous prime is 3993043. The next prime is 3993049. The reversal of 3993047 is 7403993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7403993 = 17 ⋅435529.

It is a cyclic number.

It is not a de Polignac number, because 3993047 - 2² = 3993043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3992998 and 3993016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993043) 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, 23972 + ... + 24137.

It is an arithmetic number, because the mean of its divisors is an integer number (1010310).

Almost surely, 2^3993047 is an apocalyptic number.

3993047 is a deficient number, since it is larger than the sum of its proper divisors (48193).

3993047 is an equidigital number, since it uses as much as digits as its factorization.

3993047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48192.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 3993047 is about 1998.2609939645. The cubic root of 3993047 is about 158.6480751899.

The spelling of 3993047 in words is "three million, nine hundred ninety-three thousand, forty-seven".