7791993 has 12 divisors (see below), whose sum is σ = 12278448. Its totient is φ = 4722360.

The previous prime is 7791977. The next prime is 7792003. The reversal of 7791993 is 3991977.

It is not a de Polignac number, because 7791993 - 2⁴ = 7791977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7791493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39255 + ... + 39452.

It is an arithmetic number, because the mean of its divisors is an integer number (1023204).

Almost surely, 2^7791993 is an apocalyptic number.

It is an amenable number.

7791993 is a deficient number, since it is larger than the sum of its proper divisors (4486455).

7791993 is a wasteful number, since it uses less digits than its factorization.

7791993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78724 (or 78721 counting only the distinct ones).

The product of its digits is 107163, while the sum is 45.

The square root of 7791993 is about 2791.4141577344. The cubic root of 7791993 is about 198.2513642556.

It can be divided in two parts, 779 and 1993, that added together give a palindrome (2772).

The spelling of 7791993 in words is "seven million, seven hundred ninety-one thousand, nine hundred ninety-three".