7991073 has 12 divisors (see below), whose sum is σ = 11628708. Its totient is φ = 5287680.

The previous prime is 7991059. The next prime is 7991083. The reversal of 7991073 is 3701997.

It can be written as a sum of positive squares in 2 ways, for example, as 6411024 + 1580049 = 2532^2 + 1257^2 .

It is not a de Polignac number, because 7991073 - 2⁴ = 7991057 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7991033) 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, 2008 + ... + 4473.

It is an arithmetic number, because the mean of its divisors is an integer number (969059).

Almost surely, 2^7991073 is an apocalyptic number.

It is an amenable number.

7991073 is a deficient number, since it is larger than the sum of its proper divisors (3637635).

7991073 is a wasteful number, since it uses less digits than its factorization.

7991073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6624 (or 6621 counting only the distinct ones).

The product of its (nonzero) digits is 11907, while the sum is 36.

The square root of 7991073 is about 2826.8485987049. The cubic root of 7991073 is about 199.9255806456.

The spelling of 7991073 in words is "seven million, nine hundred ninety-one thousand, seventy-three".