170139091 has 8 divisors (see below), whose sum is σ = 179236800. Its totient is φ = 161055720.

The previous prime is 170139071. The next prime is 170139097. The reversal of 170139091 is 190931071.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 170139091 - 2⁵ = 170139059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170139097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27996 + ... + 33526.

It is an arithmetic number, because the mean of its divisors is an integer number (22404600).

Almost surely, 2^170139091 is an apocalyptic number.

170139091 is a deficient number, since it is larger than the sum of its proper divisors (9097709).

170139091 is a wasteful number, since it uses less digits than its factorization.

170139091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7169.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 170139091 is about 13043.7376161896. The cubic root of 170139091 is about 554.1168661776.

The spelling of 170139091 in words is "one hundred seventy million, one hundred thirty-nine thousand, ninety-one".