689347277 has 4 divisors (see below), whose sum is σ = 690331356. Its totient is φ = 688363200.

The previous prime is 689347271. The next prime is 689347291. The reversal of 689347277 is 772743986.

689347277 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 654643396 + 34703881 = 25586^2 + 5891^2 .

It is a cyclic number.

It is not a de Polignac number, because 689347277 - 2¹⁶ = 689281741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689347271) 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, 490988 + ... + 492389.

It is an arithmetic number, because the mean of its divisors is an integer number (172582839).

Almost surely, 2^689347277 is an apocalyptic number.

It is an amenable number.

689347277 is a deficient number, since it is larger than the sum of its proper divisors (984079).

689347277 is an equidigital number, since it uses as much as digits as its factorization.

689347277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984078.

The product of its digits is 3556224, while the sum is 53.

The square root of 689347277 is about 26255.4237634817. The cubic root of 689347277 is about 883.3768655260.

The spelling of 689347277 in words is "six hundred eighty-nine million, three hundred forty-seven thousand, two hundred seventy-seven".