6785307121 has 4 divisors (see below), whose sum is σ = 7184442852. Its totient is φ = 6386171392.

The previous prime is 6785307097. The next prime is 6785307127. The reversal of 6785307121 is 1217035876.

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 1946574400 + 4838732721 = 44120^2 + 69561^2 .

It is a cyclic number.

It is not a de Polignac number, because 6785307121 - 2⁷ = 6785306993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6785307127) 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, 199567840 + ... + 199567873.

It is an arithmetic number, because the mean of its divisors is an integer number (1796110713).

Almost surely, 2^6785307121 is an apocalyptic number.

It is an amenable number.

6785307121 is a deficient number, since it is larger than the sum of its proper divisors (399135731).

6785307121 is a wasteful number, since it uses less digits than its factorization.

6785307121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399135730.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 6785307121 is about 82372.9756716364. The cubic root of 6785307121 is about 1893.1709710386.

The spelling of 6785307121 in words is "six billion, seven hundred eighty-five million, three hundred seven thousand, one hundred twenty-one".