6523643 has 4 divisors (see below), whose sum is σ = 7455600. Its totient is φ = 5591688.

The previous prime is 6523619. The next prime is 6523661. The reversal of 6523643 is 3463256.

6523643 is digitally balanced in base 3, 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 6523643 - 2¹² = 6519547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6523613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465968 + ... + 465981.

It is an arithmetic number, because the mean of its divisors is an integer number (1863900).

Almost surely, 2^6523643 is an apocalyptic number.

6523643 is a deficient number, since it is larger than the sum of its proper divisors (931957).

6523643 is an equidigital number, since it uses as much as digits as its factorization.

6523643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931956.

The product of its digits is 12960, while the sum is 29.

The square root of 6523643 is about 2554.1423217981. The cubic root of 6523643 is about 186.8515603536.

Adding to 6523643 its reverse (3463256), we get a palindrome (9986899).

The spelling of 6523643 in words is "six million, five hundred twenty-three thousand, six hundred forty-three".