171929489 has 6 divisors (see below), whose sum is σ = 172516230. Its totient is φ = 171344480.

The previous prime is 171929477. The next prime is 171929507. The reversal of 171929489 is 984929171.

It can be written as a sum of positive squares in 3 ways, for example, as 29246464 + 142683025 = 5408^2 + 11945^2 .

It is not a de Polignac number, because 171929489 - 2¹⁶ = 171863953 is a prime.

It is a super-2 number, since 2×171929489² = 59119498375602242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171929389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212117 + ... + 212925.

It is an arithmetic number, because the mean of its divisors is an integer number (28752705).

Almost surely, 2^171929489 is an apocalyptic number.

It is an amenable number.

171929489 is a deficient number, since it is larger than the sum of its proper divisors (586741).

171929489 is an frugal number, since it uses more digits than its factorization.

171929489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731 (or 1270 counting only the distinct ones).

The product of its digits is 326592, while the sum is 50.

The square root of 171929489 is about 13112.1885663683. The cubic root of 171929489 is about 556.0537715623.

The spelling of 171929489 in words is "one hundred seventy-one million, nine hundred twenty-nine thousand, four hundred eighty-nine".