1686916869 has 16 divisors (see below), whose sum is σ = 2454403584. Its totient is φ = 1022079600.

The previous prime is 1686916811. The next prime is 1686916873. The reversal of 1686916869 is 9686196861.

It is not a de Polignac number, because 1686916869 - 2¹¹ = 1686914821 is a prime.

It is a super-2 number, since 2×1686916869² = 5691377045833526322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686916169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181014 + ... + 190104.

It is an arithmetic number, because the mean of its divisors is an integer number (153400224).

Almost surely, 2^1686916869 is an apocalyptic number.

It is an amenable number.

1686916869 is a deficient number, since it is larger than the sum of its proper divisors (767486715).

1686916869 is a wasteful number, since it uses less digits than its factorization.

1686916869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14728.

The product of its digits is 6718464, while the sum is 60.

The square root of 1686916869 is about 41072.0935551135. The cubic root of 1686916869 is about 1190.4136379529.

The spelling of 1686916869 in words is "one billion, six hundred eighty-six million, nine hundred sixteen thousand, eight hundred sixty-nine".