170745993 has 24 divisors (see below), whose sum is σ = 271539840. Its totient is φ = 102526560.

The previous prime is 170745979. The next prime is 170746001. The reversal of 170745993 is 399547071.

It is not a de Polignac number, because 170745993 - 2⁹ = 170745481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (170725993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2880 + ... + 18702.

It is an arithmetic number, because the mean of its divisors is an integer number (11314160).

Almost surely, 2^170745993 is an apocalyptic number.

It is an amenable number.

170745993 is a deficient number, since it is larger than the sum of its proper divisors (100793847).

170745993 is a wasteful number, since it uses less digits than its factorization.

170745993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15949 (or 15946 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 170745993 is about 13066.9810208785. The cubic root of 170745993 is about 554.7749464932.

The spelling of 170745993 in words is "one hundred seventy million, seven hundred forty-five thousand, nine hundred ninety-three".