768683689 has 4 divisors (see below), whose sum is σ = 768739156. Its totient is φ = 768628224.

The previous prime is 768683677. The next prime is 768683711. The reversal of 768683689 is 986386867.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 986386867 = 8429 ⋅117023.

It can be written as a sum of positive squares in 2 ways, for example, as 610930089 + 157753600 = 24717^2 + 12560^2 .

It is a cyclic number.

It is not a de Polignac number, because 768683689 - 2¹⁹ = 768159401 is a prime.

It is a super-2 number, since 2×768683689² = 1181749227469297442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (768683639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12877 + ... + 41269.

It is an arithmetic number, because the mean of its divisors is an integer number (192184789).

Almost surely, 2^768683689 is an apocalyptic number.

It is an amenable number.

768683689 is a deficient number, since it is larger than the sum of its proper divisors (55467).

768683689 is a wasteful number, since it uses less digits than its factorization.

768683689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55466.

The product of its digits is 20901888, while the sum is 61.

The square root of 768683689 is about 27725.1454279324. The cubic root of 768683689 is about 916.0430594640.

The spelling of 768683689 in words is "seven hundred sixty-eight million, six hundred eighty-three thousand, six hundred eighty-nine".