173869109 has 2 divisors, whose sum is σ = 173869110. Its totient is φ = 173869108.

The previous prime is 173869103. The next prime is 173869127. The reversal of 173869109 is 901968371.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159314884 + 14554225 = 12622^2 + 3815^2 .

It is a cyclic number.

It is not a de Polignac number, because 173869109 - 2²⁰ = 172820533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 173869109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (173869103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86934554 + 86934555.

It is an arithmetic number, because the mean of its divisors is an integer number (86934555).

Almost surely, 2^173869109 is an apocalyptic number.

It is an amenable number.

173869109 is a deficient number, since it is larger than the sum of its proper divisors (1).

173869109 is an equidigital number, since it uses as much as digits as its factorization.

173869109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 173869109 is about 13185.9436143190. The cubic root of 173869109 is about 558.1369946221.

The spelling of 173869109 in words is "one hundred seventy-three million, eight hundred sixty-nine thousand, one hundred nine".