1687668111 has 12 divisors (see below), whose sum is σ = 2451836088. Its totient is φ = 1118607504.

The previous prime is 1687668053. The next prime is 1687668131. The reversal of 1687668111 is 1118667861.

It is not a de Polignac number, because 1687668111 - 2¹⁷ = 1687537039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687668131) 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 11 ways as a sum of consecutive naturals, for example, 540405 + ... + 543518.

It is an arithmetic number, because the mean of its divisors is an integer number (204319674).

Almost surely, 2^1687668111 is an apocalyptic number.

1687668111 is a deficient number, since it is larger than the sum of its proper divisors (764167977).

1687668111 is a wasteful number, since it uses less digits than its factorization.

1687668111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084102 (or 1084099 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 1687668111 is about 41081.2379438595. The cubic root of 1687668111 is about 1190.5903224157.

The spelling of 1687668111 in words is "one billion, six hundred eighty-seven million, six hundred sixty-eight thousand, one hundred eleven".