170981992 has 16 divisors (see below), whose sum is σ = 324455040. Its totient is φ = 84460656.

The previous prime is 170981959. The next prime is 170982011. The reversal of 170981992 is 299189071.

It is a happy number.

170981992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 128088 + ... + 129415.

It is an arithmetic number, because the mean of its divisors is an integer number (20278440).

Almost surely, 2^170981992 is an apocalyptic number.

It is an amenable number.

170981992 is a deficient number, since it is larger than the sum of its proper divisors (153473048).

170981992 is a wasteful number, since it uses less digits than its factorization.

170981992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257592 (or 257588 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 46.

The square root of 170981992 is about 13076.0082594039. The cubic root of 170981992 is about 555.0304255160.

The spelling of 170981992 in words is "one hundred seventy million, nine hundred eighty-one thousand, nine hundred ninety-two".