7956991 has 16 divisors (see below), whose sum is σ = 9907200. Its totient is φ = 6235488.

The previous prime is 7956989. The next prime is 7957013. The reversal of 7956991 is 1996597.

It is not a de Polignac number, because 7956991 - 2¹ = 7956989 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 (7956791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2826 + ... + 4888.

It is an arithmetic number, because the mean of its divisors is an integer number (619200).

Almost surely, 2^7956991 is an apocalyptic number.

7956991 is a deficient number, since it is larger than the sum of its proper divisors (1950209).

7956991 is a wasteful number, since it uses less digits than its factorization.

7956991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118.

The product of its digits is 153090, while the sum is 46.

The square root of 7956991 is about 2820.8138896425. The cubic root of 7956991 is about 199.6409474588.

The spelling of 7956991 in words is "seven million, nine hundred fifty-six thousand, nine hundred ninety-one".