6505091 has 4 divisors (see below), whose sum is σ = 6596784. Its totient is φ = 6413400.

The previous prime is 6505069. The next prime is 6505117. The reversal of 6505091 is 1905056.

6505091 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 6505091 - 2⁶ = 6505027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6505091.

It is not an unprimeable number, because it can be changed into a prime (6505991) 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, 45740 + ... + 45881.

It is an arithmetic number, because the mean of its divisors is an integer number (1649196).

Almost surely, 2^6505091 is an apocalyptic number.

6505091 is a deficient number, since it is larger than the sum of its proper divisors (91693).

6505091 is an equidigital number, since it uses as much as digits as its factorization.

6505091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91692.

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 6505091 is about 2550.5079886172. The cubic root of 6505091 is about 186.6742687522.

The spelling of 6505091 in words is "six million, five hundred five thousand, ninety-one".