117889 has 2 divisors, whose sum is σ = 117890. Its totient is φ = 117888.

The previous prime is 117883. The next prime is 117899. The reversal of 117889 is 988711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90000 + 27889 = 300^2 + 167^2 .

It is an emirp because it is prime and its reverse (988711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117889 - 2³ = 117881 is a prime.

117889 is a lucky number.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (117881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58944 + 58945.

It is an arithmetic number, because the mean of its divisors is an integer number (58945).

2¹¹⁷⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

117889 is a deficient number, since it is larger than the sum of its proper divisors (1).

117889 is an equidigital number, since it uses as much as digits as its factorization.

117889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 34.

The square root of 117889 is about 343.3496759864. The cubic root of 117889 is about 49.0332968190.

Subtracting from 117889 its sum of digits (34), we obtain a triangular number (117855 = T₄₈₅).

The spelling of 117889 in words is "one hundred seventeen thousand, eight hundred eighty-nine".