1686882109 has 4 divisors (see below), whose sum is σ = 1840235040. Its totient is φ = 1533529180.

The previous prime is 1686882107. The next prime is 1686882163. The reversal of 1686882109 is 9012886861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1686882109 - 2¹ = 1686882107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686882107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76676449 + ... + 76676470.

It is an arithmetic number, because the mean of its divisors is an integer number (460058760).

Almost surely, 2^1686882109 is an apocalyptic number.

It is an amenable number.

1686882109 is a deficient number, since it is larger than the sum of its proper divisors (153352931).

1686882109 is a wasteful number, since it uses less digits than its factorization.

1686882109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153352930.

The product of its (nonzero) digits is 331776, while the sum is 49.

The square root of 1686882109 is about 41071.6703945676. The cubic root of 1686882109 is about 1190.4054614855.

The spelling of 1686882109 in words is "one billion, six hundred eighty-six million, eight hundred eighty-two thousand, one hundred nine".