3996623 has 4 divisors (see below), whose sum is σ = 4001208. Its totient is φ = 3992040.

The previous prime is 3996589. The next prime is 3996647. The reversal of 3996623 is 3266993.

3996623 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3266993 = 19 ⋅171947.

It is a cyclic number.

It is not a de Polignac number, because 3996623 - 2¹⁶ = 3931087 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 (3996653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536 + ... + 2877.

It is an arithmetic number, because the mean of its divisors is an integer number (1000302).

Almost surely, 2^3996623 is an apocalyptic number.

3996623 is a deficient number, since it is larger than the sum of its proper divisors (4585).

3996623 is a wasteful number, since it uses less digits than its factorization.

3996623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4584.

The product of its digits is 52488, while the sum is 38.

The square root of 3996623 is about 1999.1555717352. The cubic root of 3996623 is about 158.6954205082.

The spelling of 3996623 in words is "three million, nine hundred ninety-six thousand, six hundred twenty-three".