6513933889 has 4 divisors (see below), whose sum is σ = 6636838356. Its totient is φ = 6391029424.

The previous prime is 6513933887. The next prime is 6513933893. The reversal of 6513933889 is 9883393156.

It is a happy number.

6513933889 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 can be written as a sum of positive squares in 2 ways, for example, as 5881662864 + 632271025 = 76692^2 + 25145^2 .

It is a cyclic number.

It is not a de Polignac number, because 6513933889 - 2¹ = 6513933887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6513933887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61452154 + ... + 61452259.

It is an arithmetic number, because the mean of its divisors is an integer number (1659209589).

Almost surely, 2^6513933889 is an apocalyptic number.

It is an amenable number.

6513933889 is a deficient number, since it is larger than the sum of its proper divisors (122904467).

6513933889 is a wasteful number, since it uses less digits than its factorization.

6513933889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122904466.

The product of its digits is 4199040, while the sum is 55.

The square root of 6513933889 is about 80708.9455326979. The cubic root of 6513933889 is about 1867.5881752627.

The spelling of 6513933889 in words is "six billion, five hundred thirteen million, nine hundred thirty-three thousand, eight hundred eighty-nine".