106687909 has 4 divisors (see below), whose sum is σ = 109571404. Its totient is φ = 103804416.

The previous prime is 106687879. The next prime is 106687913. The reversal of 106687909 is 909786601.

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

It can be written as a sum of positive squares in 2 ways, for example, as 88172100 + 18515809 = 9390^2 + 4303^2 .

It is a cyclic number.

It is not a de Polignac number, because 106687909 - 2¹⁷ = 106556837 is a prime.

It is a super-2 number, since 2×106687909² = 22764619853584562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106687969) 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, 1441692 + ... + 1441765.

It is an arithmetic number, because the mean of its divisors is an integer number (27392851).

Almost surely, 2^106687909 is an apocalyptic number.

It is an amenable number.

106687909 is a deficient number, since it is larger than the sum of its proper divisors (2883495).

106687909 is an equidigital number, since it uses as much as digits as its factorization.

106687909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883494.

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 106687909 is about 10328.9839287318. The cubic root of 106687909 is about 474.2839204729.

The spelling of 106687909 in words is "one hundred six million, six hundred eighty-seven thousand, nine hundred nine".