768394663 has 4 divisors (see below), whose sum is σ = 768454648. Its totient is φ = 768334680.

The previous prime is 768394633. The next prime is 768394667. The reversal of 768394663 is 366493867.

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: 366493867 = 1783 ⋅205549.

It is a cyclic number.

It is not a de Polignac number, because 768394663 - 2²⁵ = 734840231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 768394663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768394667) 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, 2181 + ... + 39262.

It is an arithmetic number, because the mean of its divisors is an integer number (192113662).

Almost surely, 2^768394663 is an apocalyptic number.

768394663 is a deficient number, since it is larger than the sum of its proper divisors (59985).

768394663 is a wasteful number, since it uses less digits than its factorization.

768394663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59984.

The product of its digits is 3919104, while the sum is 52.

The square root of 768394663 is about 27719.9325937131. The cubic root of 768394663 is about 915.9282339705.

The spelling of 768394663 in words is "seven hundred sixty-eight million, three hundred ninety-four thousand, six hundred sixty-three".