117891 has 6 divisors (see below), whose sum is σ = 170300. Its totient is φ = 78588.

The previous prime is 117889. The next prime is 117899. The reversal of 117891 is 198711.

It is not a de Polignac number, because 117891 - 2¹ = 117889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117899) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6541 + ... + 6558.

2¹¹⁷⁸⁹¹ is an apocalyptic number.

117891 is a deficient number, since it is larger than the sum of its proper divisors (52409).

117891 is a wasteful number, since it uses less digits than its factorization.

117891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13105 (or 13102 counting only the distinct ones).

The product of its digits is 504, while the sum is 27.

The square root of 117891 is about 343.3525884568. The cubic root of 117891 is about 49.0335741026.

The spelling of 117891 in words is "one hundred seventeen thousand, eight hundred ninety-one".