6811379993 has 4 divisors (see below), whose sum is σ = 7430596368. Its totient is φ = 6192163620.

The previous prime is 6811379983. The next prime is 6811380019. The reversal of 6811379993 is 3999731186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6811379993 - 2¹⁰ = 6811378969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6811379963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309608171 + ... + 309608192.

It is an arithmetic number, because the mean of its divisors is an integer number (1857649092).

Almost surely, 2^6811379993 is an apocalyptic number.

It is an amenable number.

6811379993 is a deficient number, since it is larger than the sum of its proper divisors (619216375).

6811379993 is a wasteful number, since it uses less digits than its factorization.

6811379993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619216374.

The product of its digits is 2204496, while the sum is 56.

The square root of 6811379993 is about 82531.0850104371. The cubic root of 6811379993 is about 1895.5927388816.

The spelling of 6811379993 in words is "six billion, eight hundred eleven million, three hundred seventy-nine thousand, nine hundred ninety-three".