171120386889 has 27 divisors (see below), whose sum is σ = 256717807437. Its totient is φ = 114057919908.

The previous prime is 171120386863. The next prime is 171120386923. The reversal of 171120386889 is 988683021171.

The square root of 171120386889 is 413667.

It is a perfect power (a square), and thus also a powerful number.

171120386889 is a `hidden beast` number, since 171 + 12 + 0 + 386 + 8 + 89 = 666.

It is a tau number, because it is divible by the number of its divisors (27).

It is not a de Polignac number, because 171120386889 - 2²¹ = 171118289737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (171120386809) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 33504474 + ... + 33509580.

Almost surely, 2^171120386889 is an apocalyptic number.

171120386889 is the 413667-th square number.

171120386889 is the 206834-th centered octagonal number.

It is an amenable number.

171120386889 is a deficient number, since it is larger than the sum of its proper divisors (85597420548).

171120386889 is an frugal number, since it uses more digits than its factorization.

171120386889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10238 (or 5110 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

It can be divided in two parts, 171120 and 386889, that added together give a square (558009 = 747²).

The spelling of 171120386889 in words is "one hundred seventy-one billion, one hundred twenty million, three hundred eighty-six thousand, eight hundred eighty-nine".