6520913 has 8 divisors (see below), whose sum is σ = 7468032. Its totient is φ = 5577696.

The previous prime is 6520903. The next prime is 6520919. The reversal of 6520913 is 3190256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6520913 - 2¹⁶ = 6455377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6520919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5456 + ... + 6542.

It is an arithmetic number, because the mean of its divisors is an integer number (933504).

Almost surely, 2^6520913 is an apocalyptic number.

It is an amenable number.

6520913 is a deficient number, since it is larger than the sum of its proper divisors (947119).

6520913 is a wasteful number, since it uses less digits than its factorization.

6520913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 6520913 is about 2553.6078399002. The cubic root of 6520913 is about 186.8254923048.

The spelling of 6520913 in words is "six million, five hundred twenty thousand, nine hundred thirteen".