3993447 has 8 divisors (see below), whose sum is σ = 5468656. Its totient is φ = 2590272.

The previous prime is 3993443. The next prime is 3993469. The reversal of 3993447 is 7443993.

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

It is not a de Polignac number, because 3993447 - 2² = 3993443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993443) 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, 17878 + ... + 18099.

It is an arithmetic number, because the mean of its divisors is an integer number (683582).

Almost surely, 2^3993447 is an apocalyptic number.

3993447 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

3993447 is a deficient number, since it is larger than the sum of its proper divisors (1475209).

3993447 is a wasteful number, since it uses less digits than its factorization.

3993447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36017.

The product of its digits is 81648, while the sum is 39.

The square root of 3993447 is about 1998.3610784841. The cubic root of 3993447 is about 158.6533724905.

It can be divided in two parts, 3993 and 447, that multiplied together give a palindrome (1784871).

The spelling of 3993447 in words is "three million, nine hundred ninety-three thousand, four hundred forty-seven".