• 117391² = 13780646881 is an anagram of the next square 117392² = 13780881664.

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117391 has 4 divisors (see below), whose sum is σ = 118800. Its totient is φ = 115984.

The previous prime is 117389. The next prime is 117413. The reversal of 117391 is 193711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 193711 = 7 ⋅27673.

It is a cyclic number.

It is not a de Polignac number, because 117391 - 2¹ = 117389 is a prime.

It is a Duffinian number.

117391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117331) 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, 571 + ... + 748.

It is an arithmetic number, because the mean of its divisors is an integer number (29700).

2¹¹⁷³⁹¹ is an apocalyptic number.

117391 is a deficient number, since it is larger than the sum of its proper divisors (1409).

117391 is an equidigital number, since it uses as much as digits as its factorization.

117391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408.

The product of its digits is 189, while the sum is 22.

The square root of 117391 is about 342.6237002894. The cubic root of 117391 is about 48.9641553762.

The spelling of 117391 in words is "one hundred seventeen thousand, three hundred ninety-one".