116391 has 8 divisors (see below), whose sum is σ = 169344. Its totient is φ = 70520.

The previous prime is 116387. The next prime is 116411. The reversal of 116391 is 193611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 116391 - 2² = 116387 is a prime.

116391 is a lucky number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1731 + ... + 1796.

It is an arithmetic number, because the mean of its divisors is an integer number (21168).

2¹¹⁶³⁹¹ is an apocalyptic number.

116391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

116391 is a deficient number, since it is larger than the sum of its proper divisors (52953).

116391 is a wasteful number, since it uses less digits than its factorization.

116391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541.

The product of its digits is 162, while the sum is 21.

The square root of 116391 is about 341.1612521961. The cubic root of 116391 is about 48.8247243253.

The spelling of 116391 in words is "one hundred sixteen thousand, three hundred ninety-one".