2289623 has 6 divisors (see below), whose sum is σ = 2663496. Its totient is φ = 1962492.

The previous prime is 2289601. The next prime is 2289641. The reversal of 2289623 is 3269822.

Added to its reverse (3269822) it gives a triangular number (5559445 = T₃₃₃₄).

It is not a de Polignac number, because 2289623 - 2¹⁴ = 2273239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2289623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2289643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23315 + ... + 23412.

It is an arithmetic number, because the mean of its divisors is an integer number (443916).

2^2289623 is an apocalyptic number.

2289623 is a deficient number, since it is larger than the sum of its proper divisors (373873).

2289623 is an equidigital number, since it uses as much as digits as its factorization.

2289623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46741 (or 46734 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 2289623 is about 1513.1500256088. The cubic root of 2289623 is about 131.8017954336.

Adding to 2289623 its reverse (3269822), we get a triangular number (5559445 = T₃₃₃₄).

The spelling of 2289623 in words is "two million, two hundred eighty-nine thousand, six hundred twenty-three".