7430991 has 8 divisors (see below), whose sum is σ = 10076160. Its totient is φ = 4869912.

The previous prime is 7430987. The next prime is 7431013. The reversal of 7430991 is 1990347.

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

It is not a de Polignac number, because 7430991 - 2² = 7430987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7430981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20815 + ... + 21168.

It is an arithmetic number, because the mean of its divisors is an integer number (1259520).

Almost surely, 2^7430991 is an apocalyptic number.

7430991 is a deficient number, since it is larger than the sum of its proper divisors (2645169).

7430991 is a wasteful number, since it uses less digits than its factorization.

7430991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42045.

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

The square root of 7430991 is about 2725.9844093465. The cubic root of 7430991 is about 195.1411732475.

The spelling of 7430991 in words is "seven million, four hundred thirty thousand, nine hundred ninety-one".