6520723 has 4 divisors (see below), whose sum is σ = 7113528. Its totient is φ = 5927920.

The previous prime is 6520699. The next prime is 6520727. The reversal of 6520723 is 3270256.

6520723 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 6520723 - 2⁵ = 6520691 is a prime.

It is a Duffinian number.

6520723 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6520727) 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, 296386 + ... + 296407.

It is an arithmetic number, because the mean of its divisors is an integer number (1778382).

Almost surely, 2^6520723 is an apocalyptic number.

6520723 is a deficient number, since it is larger than the sum of its proper divisors (592805).

6520723 is a wasteful number, since it uses less digits than its factorization.

6520723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592804.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 6520723 is about 2553.5706373625. The cubic root of 6520723 is about 186.8236777742.

Adding to 6520723 its reverse (3270256), we get a palindrome (9790979).

The spelling of 6520723 in words is "six million, five hundred twenty thousand, seven hundred twenty-three".