768973109 has 4 divisors (see below), whose sum is σ = 789756204. Its totient is φ = 748190016.

The previous prime is 768973103. The next prime is 768973151. The reversal of 768973109 is 901379867.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 738480625 + 30492484 = 27175^2 + 5522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-768973109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768973103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10391492 + ... + 10391565.

It is an arithmetic number, because the mean of its divisors is an integer number (197439051).

Almost surely, 2^768973109 is an apocalyptic number.

It is an amenable number.

768973109 is a deficient number, since it is larger than the sum of its proper divisors (20783095).

768973109 is a wasteful number, since it uses less digits than its factorization.

768973109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20783094.

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 768973109 is about 27730.3643863545. The cubic root of 768973109 is about 916.1580126491.

The spelling of 768973109 in words is "seven hundred sixty-eight million, nine hundred seventy-three thousand, one hundred nine".