6391116923 has 4 divisors (see below), whose sum is σ = 6394319280. Its totient is φ = 6387914568.

The previous prime is 6391116871. The next prime is 6391116959. The reversal of 6391116923 is 3296111936.

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 6391116923 - 2²⁴ = 6374339707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6391196923) 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, 1598183 + ... + 1602176.

It is an arithmetic number, because the mean of its divisors is an integer number (1598579820).

Almost surely, 2^6391116923 is an apocalyptic number.

6391116923 is a deficient number, since it is larger than the sum of its proper divisors (3202357).

6391116923 is a wasteful number, since it uses less digits than its factorization.

6391116923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3202356.

The product of its digits is 52488, while the sum is 41.

The square root of 6391116923 is about 79944.4614904622. The cubic root of 6391116923 is about 1855.7761442378.

The spelling of 6391116923 in words is "six billion, three hundred ninety-one million, one hundred sixteen thousand, nine hundred twenty-three".