171442889 has 4 divisors (see below), whose sum is σ = 171651024. Its totient is φ = 171234756.

The previous prime is 171442861. The next prime is 171442903. The reversal of 171442889 is 988244171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 171442889 - 2¹² = 171438793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171442829) 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, 102827 + ... + 104480.

It is an arithmetic number, because the mean of its divisors is an integer number (42912756).

Almost surely, 2^171442889 is an apocalyptic number.

It is an amenable number.

171442889 is a deficient number, since it is larger than the sum of its proper divisors (208135).

171442889 is an equidigital number, since it uses as much as digits as its factorization.

171442889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208134.

The product of its digits is 129024, while the sum is 44.

The square root of 171442889 is about 13093.6201640341. The cubic root of 171442889 is about 555.5286891911.

The spelling of 171442889 in words is "one hundred seventy-one million, four hundred forty-two thousand, eight hundred eighty-nine".