108687109 has 2 divisors, whose sum is σ = 108687110. Its totient is φ = 108687108.

The previous prime is 108687079. The next prime is 108687113. The reversal of 108687109 is 901786801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82901025 + 25786084 = 9105^2 + 5078^2 .

It is a cyclic number.

It is not a de Polignac number, because 108687109 - 2⁹ = 108686597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108687179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54343554 + 54343555.

It is an arithmetic number, because the mean of its divisors is an integer number (54343555).

Almost surely, 2^108687109 is an apocalyptic number.

It is an amenable number.

108687109 is a deficient number, since it is larger than the sum of its proper divisors (1).

108687109 is an equidigital number, since it uses as much as digits as its factorization.

108687109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 108687109 is about 10425.3109785752. The cubic root of 108687109 is about 477.2281050335.

The spelling of 108687109 in words is "one hundred eight million, six hundred eighty-seven thousand, one hundred nine".