7991141 has 4 divisors (see below), whose sum is σ = 7996800. Its totient is φ = 7985484.

The previous prime is 7991129. The next prime is 7991147. The reversal of 7991141 is 1411997.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7991141 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7991098 and 7991107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7991147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250 + ... + 4188.

It is an arithmetic number, because the mean of its divisors is an integer number (1999200).

Almost surely, 2^7991141 is an apocalyptic number.

It is an amenable number.

7991141 is a deficient number, since it is larger than the sum of its proper divisors (5659).

7991141 is a wasteful number, since it uses less digits than its factorization.

7991141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5658.

The product of its digits is 2268, while the sum is 32.

The square root of 7991141 is about 2826.8606262071. The cubic root of 7991141 is about 199.9261477326.

The spelling of 7991141 in words is "seven million, nine hundred ninety-one thousand, one hundred forty-one".