6723523 has 4 divisors (see below), whose sum is σ = 6879928. Its totient is φ = 6567120.

The previous prime is 6723503. The next prime is 6723533. The reversal of 6723523 is 3253276.

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 6723523 - 2¹⁷ = 6592451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6723491 and 6723500.

It is not an unprimeable number, because it can be changed into a prime (6723503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78138 + ... + 78223.

It is an arithmetic number, because the mean of its divisors is an integer number (1719982).

Almost surely, 2^6723523 is an apocalyptic number.

6723523 is a deficient number, since it is larger than the sum of its proper divisors (156405).

6723523 is a wasteful number, since it uses less digits than its factorization.

6723523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156404.

The product of its digits is 7560, while the sum is 28.

The square root of 6723523 is about 2592.9757037041. The cubic root of 6723523 is about 188.7407305069.

Adding to 6723523 its reverse (3253276), we get a palindrome (9976799).

The spelling of 6723523 in words is "six million, seven hundred twenty-three thousand, five hundred twenty-three".