770729 has 4 divisors (see below), whose sum is σ = 816084. Its totient is φ = 725376.

The previous prime is 770669. The next prime is 770741. The reversal of 770729 is 927077.

770729 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.

It can be written as a sum of positive squares in 2 ways, for example, as 570025 + 200704 = 755^2 + 448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-770729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 770695 and 770704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22652 + ... + 22685.

It is an arithmetic number, because the mean of its divisors is an integer number (204021).

2⁷⁷⁰⁷²⁹ is an apocalyptic number.

It is an amenable number.

770729 is a deficient number, since it is larger than the sum of its proper divisors (45355).

770729 is a wasteful number, since it uses less digits than its factorization.

770729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45354.

The product of its (nonzero) digits is 6174, while the sum is 32.

The square root of 770729 is about 877.9117267698. The cubic root of 770729 is about 91.6854808031.

The spelling of 770729 in words is "seven hundred seventy thousand, seven hundred twenty-nine".