168187138 has 8 divisors (see below), whose sum is σ = 288320832. Its totient is φ = 72080196.

The previous prime is 168187099. The next prime is 168187141. The reversal of 168187138 is 831781861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 168187094 and 168187103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6006670 + ... + 6006697.

It is an arithmetic number, because the mean of its divisors is an integer number (36040104).

Almost surely, 2^168187138 is an apocalyptic number.

168187138 is a deficient number, since it is larger than the sum of its proper divisors (120133694).

168187138 is a wasteful number, since it uses less digits than its factorization.

168187138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12013376.

The product of its digits is 64512, while the sum is 43.

The square root of 168187138 is about 12968.6983926684. The cubic root of 168187138 is about 551.9896400247.

The spelling of 168187138 in words is "one hundred sixty-eight million, one hundred eighty-seven thousand, one hundred thirty-eight".