6520039 has 4 divisors (see below), whose sum is σ = 6548256. Its totient is φ = 6491824.

The previous prime is 6519991. The next prime is 6520057. The reversal of 6520039 is 9300256.

6520039 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 a de Polignac number, because none of the positive numbers 2^k-6520039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6519995 and 6520022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520069) 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, 13759 + ... + 14224.

It is an arithmetic number, because the mean of its divisors is an integer number (1637064).

Almost surely, 2^6520039 is an apocalyptic number.

6520039 is a deficient number, since it is larger than the sum of its proper divisors (28217).

6520039 is a wasteful number, since it uses less digits than its factorization.

6520039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28216.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 6520039 is about 2553.4367037387. The cubic root of 6520039 is about 186.8171451722.

The spelling of 6520039 in words is "six million, five hundred twenty thousand, thirty-nine".