779 has 4 divisors (see below), whose sum is σ = 840. Its totient is φ = 720.

The previous prime is 773. The next prime is 787. The reversal of 779 is 977.

779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 779 - 2⁸ = 523 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6, base 10, base 13 and base 15.

It is not an unprimeable number, because it can be changed into a prime (773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2 + ... + 39.

It is an arithmetic number, because the mean of its divisors is an integer number (210).

779 is a deficient number, since it is larger than the sum of its proper divisors (61).

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

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

The sum of its prime factors is 60.

The product of its digits is 441, while the sum is 23.

The square root of 779 is about 27.9105714739. The cubic root of 779 is about 9.2012285694.

The spelling of 779 in words is "seven hundred seventy-nine", and thus it is an aban number and an oban number.