117897147 has 16 divisors (see below), whose sum is σ = 183856000. Its totient is φ = 74461032.

The previous prime is 117897139. The next prime is 117897161. The reversal of 117897147 is 741798711.

It is not a de Polignac number, because 117897147 - 2³ = 117897139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117897127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114397 + ... + 115422.

It is an arithmetic number, because the mean of its divisors is an integer number (11491000).

Almost surely, 2^117897147 is an apocalyptic number.

117897147 is a deficient number, since it is larger than the sum of its proper divisors (65958853).

117897147 is a wasteful number, since it uses less digits than its factorization.

117897147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229847 (or 229841 counting only the distinct ones).

The product of its digits is 98784, while the sum is 45.

The square root of 117897147 is about 10858.0452660688. The cubic root of 117897147 is about 490.3442631390.

The spelling of 117897147 in words is "one hundred seventeen million, eight hundred ninety-seven thousand, one hundred forty-seven".