2001623 has 8 divisors (see below), whose sum is σ = 2184000. Its totient is φ = 1823328.

The previous prime is 2001619. The next prime is 2001641. The reversal of 2001623 is 3261002.

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

It is not a de Polignac number, because 2001623 - 2² = 2001619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001598 and 2001607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001653) 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 7 ways as a sum of consecutive naturals, for example, 53 + ... + 2001.

It is an arithmetic number, because the mean of its divisors is an integer number (273000).

2^2001623 is an apocalyptic number.

2001623 is a deficient number, since it is larger than the sum of its proper divisors (182377).

2001623 is a wasteful number, since it uses less digits than its factorization.

2001623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2041.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2001623 is about 1414.7872631601. The cubic root of 2001623 is about 126.0261766392.

Adding to 2001623 its reverse (3261002), we get a palindrome (5262625).

The spelling of 2001623 in words is "two million, one thousand, six hundred twenty-three".