6843759749 has 4 divisors (see below), whose sum is σ = 6844965900. Its totient is φ = 6842553600.

The previous prime is 6843759731. The next prime is 6843759757. The reversal of 6843759749 is 9479573486.

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 3220562500 + 3623197249 = 56750^2 + 60193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6843759749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6843759691 and 6843759700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6843759799) 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, 594524 + ... + 605925.

It is an arithmetic number, because the mean of its divisors is an integer number (1711241475).

Almost surely, 2^6843759749 is an apocalyptic number.

It is an amenable number.

6843759749 is a deficient number, since it is larger than the sum of its proper divisors (1206151).

6843759749 is a wasteful number, since it uses less digits than its factorization.

6843759749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206150.

The product of its digits is 45722880, while the sum is 62.

The square root of 6843759749 is about 82727.0194616003. The cubic root of 6843759749 is about 1898.5917310647.

The spelling of 6843759749 in words is "six billion, eight hundred forty-three million, seven hundred fifty-nine thousand, seven hundred forty-nine".