768436609 has 8 divisors (see below), whose sum is σ = 789597288. Its totient is φ = 747296640.

The previous prime is 768436579. The next prime is 768436651. The reversal of 768436609 is 906634867.

768436609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 20250000 + 748186609 = 4500^2 + 27353^2 .

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 768436609 - 2¹³ = 768428417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768437609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97629 + ... + 105205.

It is an arithmetic number, because the mean of its divisors is an integer number (98699661).

Almost surely, 2^768436609 is an apocalyptic number.

It is an amenable number.

768436609 is a deficient number, since it is larger than the sum of its proper divisors (21160679).

768436609 is a wasteful number, since it uses less digits than its factorization.

768436609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10355.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 768436609 is about 27720.6891869593. The cubic root of 768436609 is about 915.9449002440.

The spelling of 768436609 in words is "seven hundred sixty-eight million, four hundred thirty-six thousand, six hundred nine".