3993995 has 4 divisors (see below), whose sum is σ = 4792800. Its totient is φ = 3195192.

The previous prime is 3993991. The next prime is 3994007. The reversal of 3993995 is 5993993.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3993995 - 2² = 3993991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3993991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399395 + ... + 399404.

It is an arithmetic number, because the mean of its divisors is an integer number (1198200).

Almost surely, 2^3993995 is an apocalyptic number.

3993995 is a deficient number, since it is larger than the sum of its proper divisors (798805).

3993995 is an equidigital number, since it uses as much as digits as its factorization.

3993995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798804.

The product of its digits is 295245, while the sum is 47.

The square root of 3993995 is about 1998.4981861388. The cubic root of 3993995 is about 158.6606292181.

It can be divided in two parts, 399 and 3995, that multiplied together give a triangular number (1594005 = T₁₇₈₅).

The spelling of 3993995 in words is "three million, nine hundred ninety-three thousand, nine hundred ninety-five".