117842409 has 24 divisors (see below), whose sum is σ = 178107072. Its totient is φ = 74939040.

The previous prime is 117842401. The next prime is 117842429. The reversal of 117842409 is 904248711.

It is not a de Polignac number, because 117842409 - 2³ = 117842401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117842401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117699 + ... + 118695.

It is an arithmetic number, because the mean of its divisors is an integer number (7421128).

Almost surely, 2^117842409 is an apocalyptic number.

It is an amenable number.

117842409 is a deficient number, since it is larger than the sum of its proper divisors (60264663).

117842409 is a wasteful number, since it uses less digits than its factorization.

117842409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 117842409 is about 10855.5243539868. The cubic root of 117842409 is about 490.2683647256.

The spelling of 117842409 in words is "one hundred seventeen million, eight hundred forty-two thousand, four hundred nine".