3996813 has 8 divisors (see below), whose sum is σ = 5348448. Its totient is φ = 2654864.

The previous prime is 3996793. The next prime is 3996827. The reversal of 3996813 is 3186993.

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

It is a cyclic number.

It is not a de Polignac number, because 3996813 - 2¹⁴ = 3980429 is a prime.

3996813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3996413) 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, 1395 + ... + 3152.

It is an arithmetic number, because the mean of its divisors is an integer number (668556).

Almost surely, 2^3996813 is an apocalyptic number.

It is an amenable number.

3996813 is a deficient number, since it is larger than the sum of its proper divisors (1351635).

3996813 is a wasteful number, since it uses less digits than its factorization.

3996813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843.

The product of its digits is 34992, while the sum is 39.

The square root of 3996813 is about 1999.2030912341. The cubic root of 3996813 is about 158.6979352689.

The spelling of 3996813 in words is "three million, nine hundred ninety-six thousand, eight hundred thirteen".