7789489 has 2 divisors, whose sum is σ = 7789490. Its totient is φ = 7789488.

The previous prime is 7789469. The next prime is 7789501. The reversal of 7789489 is 9849877.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3920400 + 3869089 = 1980^2 + 1967^2 .

It is an emirp because it is prime and its reverse (9849877) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7789489 - 2¹¹ = 7787441 is a prime.

It is a super-2 number, since 2×7789489² = 121352277762242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7789459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3894744 + 3894745.

It is an arithmetic number, because the mean of its divisors is an integer number (3894745).

Almost surely, 2^7789489 is an apocalyptic number.

It is an amenable number.

7789489 is a deficient number, since it is larger than the sum of its proper divisors (1).

7789489 is an equidigital number, since it uses as much as digits as its factorization.

7789489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 52.

The square root of 7789489 is about 2790.9656035143. The cubic root of 7789489 is about 198.2301255900.

The spelling of 7789489 in words is "seven million, seven hundred eighty-nine thousand, four hundred eighty-nine".