171213289 has 4 divisors (see below), whose sum is σ = 184383556. Its totient is φ = 158043024.

The previous prime is 171213283. The next prime is 171213299. The reversal of 171213289 is 982312171.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27405225 + 143808064 = 5235^2 + 11992^2 .

It is a cyclic number.

It is not a de Polignac number, because 171213289 - 2²¹ = 169116137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171213283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6585114 + ... + 6585139.

It is an arithmetic number, because the mean of its divisors is an integer number (46095889).

Almost surely, 2^171213289 is an apocalyptic number.

It is an amenable number.

171213289 is a deficient number, since it is larger than the sum of its proper divisors (13170267).

171213289 is a wasteful number, since it uses less digits than its factorization.

171213289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13170266.

The product of its digits is 6048, while the sum is 34.

The square root of 171213289 is about 13084.8495979128. The cubic root of 171213289 is about 555.2805864184.

The spelling of 171213289 in words is "one hundred seventy-one million, two hundred thirteen thousand, two hundred eighty-nine".