170998121 has 24 divisors (see below), whose sum is σ = 209192256. Its totient is φ = 136892160.

The previous prime is 170998097. The next prime is 170998133. The reversal of 170998121 is 121899071.

It is not a de Polignac number, because 170998121 - 2¹⁴ = 170981737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (170998021) 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 23 ways as a sum of consecutive naturals, for example, 365930 + ... + 366396.

It is an arithmetic number, because the mean of its divisors is an integer number (8716344).

Almost surely, 2^170998121 is an apocalyptic number.

It is an amenable number.

170998121 is a deficient number, since it is larger than the sum of its proper divisors (38194135).

170998121 is a wasteful number, since it uses less digits than its factorization.

170998121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 38.

The square root of 170998121 is about 13076.6249850640. The cubic root of 170998121 is about 555.0478772646.

The spelling of 170998121 in words is "one hundred seventy million, nine hundred ninety-eight thousand, one hundred twenty-one".