770891 has 12 divisors (see below), whose sum is σ = 887376. Its totient is φ = 667920.

The previous prime is 770881. The next prime is 770897. The reversal of 770891 is 198077.

It is a de Polignac number, because none of the positive numbers 2^k-770891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (770897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2645 + ... + 2921.

It is an arithmetic number, because the mean of its divisors is an integer number (73948).

2⁷⁷⁰⁸⁹¹ is an apocalyptic number.

770891 is a deficient number, since it is larger than the sum of its proper divisors (116485).

770891 is a wasteful number, since it uses less digits than its factorization.

770891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 770891 is about 878.0039863235. The cubic root of 770891 is about 91.6919041621.

It can be divided in two parts, 770 and 891, that added together give a palindrome (1661).

The spelling of 770891 in words is "seven hundred seventy thousand, eight hundred ninety-one".