2523643 has 2 divisors, whose sum is σ = 2523644. Its totient is φ = 2523642.

The previous prime is 2523641. The next prime is 2523671. The reversal of 2523643 is 3463252.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2523643 - 2¹ = 2523641 is a prime.

Together with 2523641, it forms a pair of twin primes.

2523643 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2523641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1261821 + 1261822.

It is an arithmetic number, because the mean of its divisors is an integer number (1261822).

2^2523643 is an apocalyptic number.

2523643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2523643 is an equidigital number, since it uses as much as digits as its factorization.

2523643 is an evil number, because the sum of its binary digits is even.

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

The square root of 2523643 is about 1588.5978093904. The cubic root of 2523643 is about 136.1473856331.

Adding to 2523643 its reverse (3463252), we get a palindrome (5986895).

The spelling of 2523643 in words is "two million, five hundred twenty-three thousand, six hundred forty-three".