7268991 has 4 divisors (see below), whose sum is σ = 9691992. Its totient is φ = 4845992.

The previous prime is 7268981. The next prime is 7268999. The reversal of 7268991 is 1998627.

7268991 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7268991 - 2¹⁴ = 7252607 is a prime.

7268991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7268999) 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 3 ways as a sum of consecutive naturals, for example, 1211496 + ... + 1211501.

It is an arithmetic number, because the mean of its divisors is an integer number (2422998).

Almost surely, 2^7268991 is an apocalyptic number.

7268991 is a deficient number, since it is larger than the sum of its proper divisors (2423001).

7268991 is a wasteful number, since it uses less digits than its factorization.

7268991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2423000.

The product of its digits is 54432, while the sum is 42.

The square root of 7268991 is about 2696.1066373569. The cubic root of 7268991 is about 193.7126773756.

The spelling of 7268991 in words is "seven million, two hundred sixty-eight thousand, nine hundred ninety-one".