117643 has 2 divisors, whose sum is σ = 117644. Its totient is φ = 117642.

The previous prime is 117619. The next prime is 117659. The reversal of 117643 is 346711.

It is a strong prime.

It is an emirp because it is prime and its reverse (346711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117643 - 2¹³ = 109451 is a prime.

It is an Ulam number.

It is a plaindrome in base 15.

It is a nialpdrome in base 7.

It is not a weakly prime, because it can be changed into another prime (117673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58821 + 58822.

It is an arithmetic number, because the mean of its divisors is an integer number (58822).

117643 is a Friedman number, since it can be written as 7^((4*3)/(1+1))-6, using all its digits and the basic arithmetic operations.

2¹¹⁷⁶⁴³ is an apocalyptic number.

117643 is a deficient number, since it is larger than the sum of its proper divisors (1).

117643 is an equidigital number, since it uses as much as digits as its factorization.

117643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 22.

The square root of 117643 is about 342.9912535328. The cubic root of 117643 is about 48.9991669996. Note that the first 3 decimals are identical.

The spelling of 117643 in words is "one hundred seventeen thousand, six hundred forty-three".