7997489 has 2 divisors, whose sum is σ = 7997490. Its totient is φ = 7997488.

The previous prime is 7997477. The next prime is 7997519. The reversal of 7997489 is 9847997.

7997489 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7333264 + 664225 = 2708^2 + 815^2 .

It is an emirp because it is prime and its reverse (9847997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7997489 - 2¹⁶ = 7931953 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7997489.

It is not a weakly prime, because it can be changed into another prime (7997389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3998744 + 3998745.

It is an arithmetic number, because the mean of its divisors is an integer number (3998745).

Almost surely, 2^7997489 is an apocalyptic number.

It is an amenable number.

7997489 is a deficient number, since it is larger than the sum of its proper divisors (1).

7997489 is an equidigital number, since it uses as much as digits as its factorization.

7997489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 53.

The square root of 7997489 is about 2827.9832036276. The cubic root of 7997489 is about 199.9790728103.

The spelling of 7997489 in words is "seven million, nine hundred ninety-seven thousand, four hundred eighty-nine".