689879811 has 16 divisors (see below), whose sum is σ = 961380000. Its totient is φ = 439477248.

The previous prime is 689879717. The next prime is 689879819. The reversal of 689879811 is 118978986.

689879811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 689879811 - 2⁹ = 689879299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689879819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32436 + ... + 49313.

It is an arithmetic number, because the mean of its divisors is an integer number (60086250).

Almost surely, 2^689879811 is an apocalyptic number.

689879811 is a deficient number, since it is larger than the sum of its proper divisors (271500189).

689879811 is a wasteful number, since it uses less digits than its factorization.

689879811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81878.

The product of its digits is 1741824, while the sum is 57.

The square root of 689879811 is about 26265.5632149779. The cubic root of 689879811 is about 883.6042821683.

The spelling of 689879811 in words is "six hundred eighty-nine million, eight hundred seventy-nine thousand, eight hundred eleven".