689791898 has 8 divisors (see below), whose sum is σ = 1095551892. Its totient is φ = 324607936.

The previous prime is 689791877. The next prime is 689791967. The reversal of 689791898 is 898197986.

689791898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 673039249 + 16752649 = 25943^2 + 4093^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10143965 + ... + 10144032.

Almost surely, 2^689791898 is an apocalyptic number.

689791898 is a deficient number, since it is larger than the sum of its proper divisors (405759994).

689791898 is a wasteful number, since it uses less digits than its factorization.

689791898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20288016.

The product of its digits is 15676416, while the sum is 65.

The square root of 689791898 is about 26263.8896205417. The cubic root of 689791898 is about 883.5667473195.

The spelling of 689791898 in words is "six hundred eighty-nine million, seven hundred ninety-one thousand, eight hundred ninety-eight".