7983791 has 4 divisors (see below), whose sum is σ = 8093232. Its totient is φ = 7874352.

The previous prime is 7983763. The next prime is 7983793. The reversal of 7983791 is 1973897.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7983791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7983793) 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, 54611 + ... + 54756.

It is an arithmetic number, because the mean of its divisors is an integer number (2023308).

Almost surely, 2^7983791 is an apocalyptic number.

7983791 is a deficient number, since it is larger than the sum of its proper divisors (109441).

7983791 is a wasteful number, since it uses less digits than its factorization.

7983791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109440.

The product of its digits is 95256, while the sum is 44.

The square root of 7983791 is about 2825.5602984187. The cubic root of 7983791 is about 199.8648336709.

The spelling of 7983791 in words is "seven million, nine hundred eighty-three thousand, seven hundred ninety-one".