6520023 has 6 divisors (see below), whose sum is σ = 9417824. Its totient is φ = 4346676.

The previous prime is 6519991. The next prime is 6520057. The reversal of 6520023 is 3200256.

It is not a de Polignac number, because 6520023 - 2⁵ = 6519991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6519978 and 6520005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 362215 + ... + 362232.

Almost surely, 2^6520023 is an apocalyptic number.

6520023 is a deficient number, since it is larger than the sum of its proper divisors (2897801).

6520023 is a wasteful number, since it uses less digits than its factorization.

6520023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724453 (or 724450 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 6520023 is about 2553.4335707044. The cubic root of 6520023 is about 186.8169923573.

Adding to 6520023 its reverse (3200256), we get a palindrome (9720279).

The spelling of 6520023 in words is "six million, five hundred twenty thousand, twenty-three".