7991149 has 8 divisors (see below), whose sum is σ = 8473088. Its totient is φ = 7523280.

The previous prime is 7991147. The next prime is 7991167. The reversal of 7991149 is 9411997.

It is a happy number.

7991149 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7991149 - 2¹ = 7991147 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 (7991147) 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 7 ways as a sum of consecutive naturals, for example, 2337 + ... + 4630.

It is an arithmetic number, because the mean of its divisors is an integer number (1059136).

Almost surely, 2^7991149 is an apocalyptic number.

It is an amenable number.

7991149 is a deficient number, since it is larger than the sum of its proper divisors (481939).

7991149 is a wasteful number, since it uses less digits than its factorization.

7991149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7035.

The product of its digits is 20412, while the sum is 40.

The square root of 7991149 is about 2826.8620412040. The cubic root of 7991149 is about 199.9262144485.

The spelling of 7991149 in words is "seven million, nine hundred ninety-one thousand, one hundred forty-nine".