7991043 has 12 divisors (see below), whose sum is σ = 10837080. Its totient is φ = 5237056.

The previous prime is 7991033. The next prime is 7991047. The reversal of 7991043 is 3401997.

It is not a de Polignac number, because 7991043 - 2¹² = 7986947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7990995 and 7991013.

It is not an unprimeable number, because it can be changed into a prime (7991047) 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, 46105 + ... + 46277.

It is an arithmetic number, because the mean of its divisors is an integer number (903090).

Almost surely, 2^7991043 is an apocalyptic number.

7991043 is a deficient number, since it is larger than the sum of its proper divisors (2846037).

7991043 is an equidigital number, since it uses as much as digits as its factorization.

7991043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 7991043 is about 2826.8432924377. The cubic root of 7991043 is about 199.9253304591.

The spelling of 7991043 in words is "seven million, nine hundred ninety-one thousand, forty-three".