117647 has 4 divisors (see below), whose sum is σ = 119376. Its totient is φ = 115920.

The previous prime is 117643. The next prime is 117659. The reversal of 117647 is 746711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117647 - 2² = 117643 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 117647.

It is not an unprimeable number, because it can be changed into a prime (117643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758 + ... + 899.

It is an arithmetic number, because the mean of its divisors is an integer number (29844).

117647 is a Friedman number, since it can be written as 7^6-7+4+1*1, using all its digits and the basic arithmetic operations.

2¹¹⁷⁶⁴⁷ is an apocalyptic number.

117647 is a deficient number, since it is larger than the sum of its proper divisors (1729).

117647 is an equidigital number, since it uses as much as digits as its factorization.

117647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728.

The product of its digits is 1176, while the sum is 26.

The square root of 117647 is about 342.9970845357. The cubic root of 117647 is about 48.9997223363. Note that the first 3 decimals are identical.

The spelling of 117647 in words is "one hundred seventeen thousand, six hundred forty-seven".