171209980 has 12 divisors (see below), whose sum is σ = 359541000. Its totient is φ = 68483984.

The previous prime is 171209957. The next prime is 171210001. The reversal of 171209980 is 89902171.

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, 4280230 + ... + 4280269.

It is an arithmetic number, because the mean of its divisors is an integer number (29961750).

Almost surely, 2^171209980 is an apocalyptic number.

171209980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171209980 is an abundant number, since it is smaller than the sum of its proper divisors (188331020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171209980 is a wasteful number, since it uses less digits than its factorization.

171209980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8560508 (or 8560506 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 171209980 is about 13084.7231533571. The cubic root of 171209980 is about 555.2770091351.

The spelling of 171209980 in words is "one hundred seventy-one million, two hundred nine thousand, nine hundred eighty".