7922791 has 4 divisors (see below), whose sum is σ = 8339800. Its totient is φ = 7505784.

The previous prime is 7922779. The next prime is 7922801. The reversal of 7922791 is 1972297.

7922791 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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-7922791 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7922791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7922711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208476 + ... + 208513.

It is an arithmetic number, because the mean of its divisors is an integer number (2084950).

Almost surely, 2^7922791 is an apocalyptic number.

7922791 is a deficient number, since it is larger than the sum of its proper divisors (417009).

7922791 is a wasteful number, since it uses less digits than its factorization.

7922791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417008.

The product of its digits is 15876, while the sum is 37.

The square root of 7922791 is about 2814.7452815486. The cubic root of 7922791 is about 199.3545106252.

The spelling of 7922791 in words is "seven million, nine hundred twenty-two thousand, seven hundred ninety-one".