170990 has 8 divisors (see below), whose sum is σ = 307800. Its totient is φ = 68392.

The previous prime is 170971. The next prime is 171007. The reversal of 170990 is 99071.

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

It is a plaindrome in base 16.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8540 + ... + 8559.

It is an arithmetic number, because the mean of its divisors is an integer number (38475).

2¹⁷⁰⁹⁹⁰ is an apocalyptic number.

170990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

170990 is a deficient number, since it is larger than the sum of its proper divisors (136810).

170990 is a wasteful number, since it uses less digits than its factorization.

170990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17106.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 170990 is about 413.5093711151. The cubic root of 170990 is about 55.5039090394.

The spelling of 170990 in words is "one hundred seventy thousand, nine hundred ninety".