106781687 has 2 divisors, whose sum is σ = 106781688. Its totient is φ = 106781686.

The previous prime is 106781677. The next prime is 106781711. The reversal of 106781687 is 786187601.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 106781687 - 2¹⁶ = 106716151 is a prime.

It is a super-2 number, since 2×106781687² = 22804657357131938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106781627) 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 as a sum of consecutive naturals, namely, 53390843 + 53390844.

It is an arithmetic number, because the mean of its divisors is an integer number (53390844).

Almost surely, 2^106781687 is an apocalyptic number.

106781687 is a deficient number, since it is larger than the sum of its proper divisors (1).

106781687 is an equidigital number, since it uses as much as digits as its factorization.

106781687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 106781687 is about 10333.5224875161. The cubic root of 106781687 is about 474.4228439694.

The spelling of 106781687 in words is "one hundred six million, seven hundred eighty-one thousand, six hundred eighty-seven".