7288891 has 2 divisors, whose sum is σ = 7288892. Its totient is φ = 7288890.

The previous prime is 7288877. The next prime is 7288909. The reversal of 7288891 is 1988827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7288891 - 2⁷ = 7288763 is a prime.

It is not a weakly prime, because it can be changed into another prime (7288591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3644445 + 3644446.

It is an arithmetic number, because the mean of its divisors is an integer number (3644446).

Almost surely, 2^7288891 is an apocalyptic number.

7288891 is the 1708-th centered pentagonal number.

7288891 is a deficient number, since it is larger than the sum of its proper divisors (1).

7288891 is an equidigital number, since it uses as much as digits as its factorization.

7288891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 43.

The square root of 7288891 is about 2699.7946218185. The cubic root of 7288891 is about 193.8892892253.

The spelling of 7288891 in words is "seven million, two hundred eighty-eight thousand, eight hundred ninety-one".