2643523 has 2 divisors, whose sum is σ = 2643524. Its totient is φ = 2643522.

The previous prime is 2643497. The next prime is 2643547. The reversal of 2643523 is 3253462.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2643523 - 2⁵ = 2643491 is a prime.

It is a d-powerful number, because it can be written as 2⁸ + 6 + 4⁴ + 3⁴ + 5² + 2²⁰ + 3¹³ .

It is not a weakly prime, because it can be changed into another prime (2643583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321761 + 1321762.

It is an arithmetic number, because the mean of its divisors is an integer number (1321762).

2^2643523 is an apocalyptic number.

2643523 is a deficient number, since it is larger than the sum of its proper divisors (1).

2643523 is an equidigital number, since it uses as much as digits as its factorization.

2643523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 25.

The square root of 2643523 is about 1625.8914477910. The cubic root of 2643523 is about 138.2699156094.

Adding to 2643523 its reverse (3253462), we get a palindrome (5896985).

The spelling of 2643523 in words is "two million, six hundred forty-three thousand, five hundred twenty-three".