170998993 has 32 divisors (see below), whose sum is σ = 206064000. Its totient is φ = 140152320.

The previous prime is 170998991. The next prime is 170998999. The reversal of 170998993 is 399899071.

It is not a de Polignac number, because 170998993 - 2¹ = 170998991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170998991) 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 31 ways as a sum of consecutive naturals, for example, 539271 + ... + 539587.

It is an arithmetic number, because the mean of its divisors is an integer number (6439500).

Almost surely, 2^170998993 is an apocalyptic number.

It is an amenable number.

170998993 is a deficient number, since it is larger than the sum of its proper divisors (35065007).

170998993 is a wasteful number, since it uses less digits than its factorization.

170998993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465.

The product of its (nonzero) digits is 1102248, while the sum is 55.

The square root of 170998993 is about 13076.6583269580. The cubic root of 170998993 is about 555.0488207466.

It can be divided in two parts, 170998 and 993, that added together give a triangular number (171991 = T₅₈₆).

The spelling of 170998993 in words is "one hundred seventy million, nine hundred ninety-eight thousand, nine hundred ninety-three".