768986809 has 8 divisors (see below), whose sum is σ = 779205960. Its totient is φ = 758827776.

The previous prime is 768986749. The next prime is 768986821. The reversal of 768986809 is 908689867.

It can be written as a sum of positive squares in 4 ways, for example, as 190440000 + 578546809 = 13800^2 + 24053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 768986809 - 2⁷ = 768986681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768986839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11019 + ... + 40735.

It is an arithmetic number, because the mean of its divisors is an integer number (97400745).

Almost surely, 2^768986809 is an apocalyptic number.

It is an amenable number.

768986809 is a deficient number, since it is larger than the sum of its proper divisors (10219151).

768986809 is a wasteful number, since it uses less digits than its factorization.

768986809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30059.

The product of its (nonzero) digits is 10450944, while the sum is 61.

The square root of 768986809 is about 27730.6114068911. The cubic root of 768986809 is about 916.1634533640.

The spelling of 768986809 in words is "seven hundred sixty-eight million, nine hundred eighty-six thousand, eight hundred nine".