689392811 has 4 divisors (see below), whose sum is σ = 691829112. Its totient is φ = 686956512.

The previous prime is 689392807. The next prime is 689392831. The reversal of 689392811 is 118293986.

689392811 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 689392811 - 2² = 689392807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689392831) 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, 1217726 + ... + 1218291.

It is an arithmetic number, because the mean of its divisors is an integer number (172957278).

Almost surely, 2^689392811 is an apocalyptic number.

689392811 is a deficient number, since it is larger than the sum of its proper divisors (2436301).

689392811 is a wasteful number, since it uses less digits than its factorization.

689392811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436300.

The product of its digits is 186624, while the sum is 47.

The square root of 689392811 is about 26256.2908842814. The cubic root of 689392811 is about 883.3963152276.

The spelling of 689392811 in words is "six hundred eighty-nine million, three hundred ninety-two thousand, eight hundred eleven".