1689055055 has 4 divisors (see below), whose sum is σ = 2026866072. Its totient is φ = 1351244040.

The previous prime is 1689055051. The next prime is 1689055061. The reversal of 1689055055 is 5505509861.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1689055055 - 2² = 1689055051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1689054997 and 1689055015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689055051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168905501 + ... + 168905510.

It is an arithmetic number, because the mean of its divisors is an integer number (506716518).

Almost surely, 2^1689055055 is an apocalyptic number.

1689055055 is a deficient number, since it is larger than the sum of its proper divisors (337811017).

1689055055 is an equidigital number, since it uses as much as digits as its factorization.

1689055055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337811016.

The product of its (nonzero) digits is 270000, while the sum is 44.

The square root of 1689055055 is about 41098.1149811035. The cubic root of 1689055055 is about 1190.9163798028.

The spelling of 1689055055 in words is "one billion, six hundred eighty-nine million, fifty-five thousand, fifty-five".