117947 has 4 divisors (see below), whose sum is σ = 119520. Its totient is φ = 116376.

The previous prime is 117937. The next prime is 117959. The reversal of 117947 is 749711.

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 117947 - 2⁶ = 117883 is a prime.

It is a super-2 number, since 2×117947² = 27822989618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117917) 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, 668 + ... + 825.

It is an arithmetic number, because the mean of its divisors is an integer number (29880).

2¹¹⁷⁹⁴⁷ is an apocalyptic number.

117947 is a deficient number, since it is larger than the sum of its proper divisors (1573).

117947 is an equidigital number, since it uses as much as digits as its factorization.

117947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572.

The product of its digits is 1764, while the sum is 29.

The square root of 117947 is about 343.4341275995. The cubic root of 117947 is about 49.0413367689.

The spelling of 117947 in words is "one hundred seventeen thousand, nine hundred forty-seven".