170170091 has 12 divisors (see below), whose sum is σ = 213180912. Its totient is φ = 134639568.

The previous prime is 170170087. The next prime is 170170171. The reversal of 170170091 is 190071071.

170170091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 170170091 - 2² = 170170087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 170170091.

It is not an unprimeable number, because it can be changed into a prime (170170001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132935 + ... + 134208.

It is an arithmetic number, because the mean of its divisors is an integer number (17765076).

Almost surely, 2^170170091 is an apocalyptic number.

170170091 is a deficient number, since it is larger than the sum of its proper divisors (43010821).

170170091 is a wasteful number, since it uses less digits than its factorization.

170170091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267170 (or 267163 counting only the distinct ones).

The product of its (nonzero) digits is 441, while the sum is 26.

The square root of 170170091 is about 13044.9258717710. The cubic root of 170170091 is about 554.1505182121.

The spelling of 170170091 in words is "one hundred seventy million, one hundred seventy thousand, ninety-one".