168161187 has 8 divisors (see below), whose sum is σ = 224287936. Its totient is φ = 112070952.

The previous prime is 168161177. The next prime is 168161207. The reversal of 168161187 is 781161861.

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

It is not a de Polignac number, because 168161187 - 2¹² = 168157091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168161107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4548 + ... + 18894.

It is an arithmetic number, because the mean of its divisors is an integer number (28035992).

Almost surely, 2^168161187 is an apocalyptic number.

168161187 is a deficient number, since it is larger than the sum of its proper divisors (56126749).

168161187 is a wasteful number, since it uses less digits than its factorization.

168161187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18257.

The product of its digits is 16128, while the sum is 39.

The square root of 168161187 is about 12967.6978296072. The cubic root of 168161187 is about 551.9612481985.

The spelling of 168161187 in words is "one hundred sixty-eight million, one hundred sixty-one thousand, one hundred eighty-seven".