117717838 has 16 divisors (see below), whose sum is σ = 201982464. Its totient is φ = 50405400.

The previous prime is 117717827. The next prime is 117717857. The reversal of 117717838 is 838717711.

It is a junction number, because it is equal to n+sod(n) for n = 117717794 and 117717803.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16063 + ... + 22213.

It is an arithmetic number, because the mean of its divisors is an integer number (12623904).

Almost surely, 2^117717838 is an apocalyptic number.

117717838 is a deficient number, since it is larger than the sum of its proper divisors (84264626).

117717838 is a wasteful number, since it uses less digits than its factorization.

117717838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7527.

The product of its digits is 65856, while the sum is 43.

The square root of 117717838 is about 10849.7851591633. The cubic root of 117717838 is about 490.0955498797.

The spelling of 117717838 in words is "one hundred seventeen million, seven hundred seventeen thousand, eight hundred thirty-eight".