2643503 has 4 divisors (see below), whose sum is σ = 2653128. Its totient is φ = 2633880.

The previous prime is 2643497. The next prime is 2643523. The reversal of 2643503 is 3053462.

2643503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2643503 - 2⁶ = 2643439 is a prime.

It is a super-2 number, since 2×2643503² = 13976216222018, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁹ + 6 + 4¹⁰ + 3⁴ + 5 + 0 + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4388 + ... + 4953.

It is an arithmetic number, because the mean of its divisors is an integer number (663282).

2^2643503 is an apocalyptic number.

2643503 is a deficient number, since it is larger than the sum of its proper divisors (9625).

2643503 is an equidigital number, since it uses as much as digits as its factorization.

2643503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9624.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 2643503 is about 1625.8852973073. The cubic root of 2643503 is about 138.2695669074.

Adding to 2643503 its reverse (3053462), we get a palindrome (5696965).

The spelling of 2643503 in words is "two million, six hundred forty-three thousand, five hundred three".