776867489 has 2 divisors, whose sum is σ = 776867490. Its totient is φ = 776867488.

The previous prime is 776867477. The next prime is 776867501. The reversal of 776867489 is 984768677.

It is a balanced prime because it is at equal distance from previous prime (776867477) and next prime (776867501).

It can be written as a sum of positive squares in only one way, i.e., 511438225 + 265429264 = 22615^2 + 16292^2 .

It is an emirp because it is prime and its reverse (984768677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 776867489 - 2⁴ = 776867473 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (776867449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388433744 + 388433745.

It is an arithmetic number, because the mean of its divisors is an integer number (388433745).

Almost surely, 2^776867489 is an apocalyptic number.

It is an amenable number.

776867489 is a deficient number, since it is larger than the sum of its proper divisors (1).

776867489 is an equidigital number, since it uses as much as digits as its factorization.

776867489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28449792, while the sum is 62.

The square root of 776867489 is about 27872.3427253613. The cubic root of 776867489 is about 919.2824781102.

It can be divided in two parts, 7768 and 67489, that added together give a palindrome (75257).

The spelling of 776867489 in words is "seven hundred seventy-six million, eight hundred sixty-seven thousand, four hundred eighty-nine".