770991 has 16 divisors (see below), whose sum is σ = 1130976. Its totient is φ = 464256.

The previous prime is 770981. The next prime is 770993. The reversal of 770991 is 199077.

770991 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 770991 - 2⁶ = 770927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1881 + ... + 2253.

It is an arithmetic number, because the mean of its divisors is an integer number (70686).

2⁷⁷⁰⁹⁹¹ is an apocalyptic number.

770991 is a deficient number, since it is larger than the sum of its proper divisors (359985).

770991 is a wasteful number, since it uses less digits than its factorization.

770991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its (nonzero) digits is 3969, while the sum is 33.

The square root of 770991 is about 878.0609318265. The cubic root of 770991 is about 91.6958687494.

The spelling of 770991 in words is "seven hundred seventy thousand, nine hundred ninety-one".