768989869 has 4 divisors (see below), whose sum is σ = 809463040. Its totient is φ = 728516700.

The previous prime is 768989867. The next prime is 768989873. The reversal of 768989869 is 968989867.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 768989869 - 2¹ = 768989867 is a prime.

It is a super-2 number, since 2×768989869² = 1182690837249274322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 768989798 and 768989807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768989867) 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 3 ways as a sum of consecutive naturals, for example, 20236557 + ... + 20236594.

It is an arithmetic number, because the mean of its divisors is an integer number (202365760).

Almost surely, 2^768989869 is an apocalyptic number.

It is an amenable number.

768989869 is a deficient number, since it is larger than the sum of its proper divisors (40473171).

768989869 is a wasteful number, since it uses less digits than its factorization.

768989869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40473170.

The product of its digits is 94058496, while the sum is 70.

The square root of 768989869 is about 27730.6665805206. Note that the first 3 decimals coincide. The cubic root of 768989869 is about 916.1646685805.

The spelling of 768989869 in words is "seven hundred sixty-eight million, nine hundred eighty-nine thousand, eight hundred sixty-nine".