170649109 has 4 divisors (see below), whose sum is σ = 171736204. Its totient is φ = 169562016.

The previous prime is 170649071. The next prime is 170649119. The reversal of 170649109 is 901946071.

170649109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 37246609 + 133402500 = 6103^2 + 11550^2 .

It is a cyclic number.

It is not a de Polignac number, because 170649109 - 2²⁵ = 137094677 is a prime.

It is a super-2 number, since 2×170649109² = 58242236804987762, 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 (170649119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543312 + ... + 543625.

It is an arithmetic number, because the mean of its divisors is an integer number (42934051).

Almost surely, 2^170649109 is an apocalyptic number.

It is an amenable number.

170649109 is a deficient number, since it is larger than the sum of its proper divisors (1087095).

170649109 is a wasteful number, since it uses less digits than its factorization.

170649109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087094.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 170649109 is about 13063.2732881158. The cubic root of 170649109 is about 554.6699972561.

The spelling of 170649109 in words is "one hundred seventy million, six hundred forty-nine thousand, one hundred nine".