770391 has 10 divisors (see below), whose sum is σ = 1150952. Its totient is φ = 513540.

The previous prime is 770387. The next prime is 770401. The reversal of 770391 is 193077.

It is not a de Polignac number, because 770391 - 2² = 770387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770311) 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 9 ways as a sum of consecutive naturals, for example, 4675 + ... + 4836.

2⁷⁷⁰³⁹¹ is an apocalyptic number.

770391 is a deficient number, since it is larger than the sum of its proper divisors (380561).

770391 is an equidigital number, since it uses as much as digits as its factorization.

770391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9523 (or 9514 counting only the distinct ones).

The product of its (nonzero) digits is 1323, while the sum is 27.

The square root of 770391 is about 877.7192033902. The cubic root of 770391 is about 91.6720760811.

The spelling of 770391 in words is "seven hundred seventy thousand, three hundred ninety-one".