689779307 has 4 divisors (see below), whose sum is σ = 788319216. Its totient is φ = 591239400.

The previous prime is 689779289. The next prime is 689779309. The reversal of 689779307 is 703977986.

689779307 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 is a cyclic number.

It is not a de Polignac number, because 689779307 - 2¹⁰ = 689778283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689779309) 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, 49269944 + ... + 49269957.

It is an arithmetic number, because the mean of its divisors is an integer number (197079804).

Almost surely, 2^689779307 is an apocalyptic number.

689779307 is a deficient number, since it is larger than the sum of its proper divisors (98539909).

689779307 is an equidigital number, since it uses as much as digits as its factorization.

689779307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98539908.

The product of its (nonzero) digits is 4000752, while the sum is 56.

The square root of 689779307 is about 26263.6499177095. The cubic root of 689779307 is about 883.5613712747.

The spelling of 689779307 in words is "six hundred eighty-nine million, seven hundred seventy-nine thousand, three hundred seven".