768309853 has 4 divisors (see below), whose sum is σ = 786177568. Its totient is φ = 750442140.

The previous prime is 768309809. The next prime is 768309863. The reversal of 768309853 is 358903867.

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 768309853 - 2²⁵ = 734755421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 768309797 and 768309806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768309803) 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, 8933793 + ... + 8933878.

It is an arithmetic number, because the mean of its divisors is an integer number (196544392).

Almost surely, 2^768309853 is an apocalyptic number.

It is an amenable number.

768309853 is a deficient number, since it is larger than the sum of its proper divisors (17867715).

768309853 is a wasteful number, since it uses less digits than its factorization.

768309853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17867714.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 768309853 is about 27718.4027858749. The cubic root of 768309853 is about 915.8945348246.

The spelling of 768309853 in words is "seven hundred sixty-eight million, three hundred nine thousand, eight hundred fifty-three".