2113623 has 6 divisors (see below), whose sum is σ = 3053024. Its totient is φ = 1409076.

The previous prime is 2113609. The next prime is 2113651. The reversal of 2113623 is 3263112.

It is not a de Polignac number, because 2113623 - 2¹³ = 2105431 is a prime.

It is a super-2 number, since 2×2113623² = 8934804372258, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2113596 and 2113605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 117415 + ... + 117432.

2^2113623 is an apocalyptic number.

2113623 is a deficient number, since it is larger than the sum of its proper divisors (939401).

2113623 is a wasteful number, since it uses less digits than its factorization.

2113623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234853 (or 234850 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 2113623 is about 1453.8304577907. The cubic root of 2113623 is about 128.3342298620.

Adding to 2113623 its reverse (3263112), we get a palindrome (5376735).

The spelling of 2113623 in words is "two million, one hundred thirteen thousand, six hundred twenty-three".