168144647 has 4 divisors (see below), whose sum is σ = 183430536. Its totient is φ = 152858760.

The previous prime is 168144643. The next prime is 168144653. The reversal of 168144647 is 746441861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 168144647 - 2² = 168144643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168144643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7642928 + ... + 7642949.

It is an arithmetic number, because the mean of its divisors is an integer number (45857634).

Almost surely, 2^168144647 is an apocalyptic number.

168144647 is a deficient number, since it is larger than the sum of its proper divisors (15285889).

168144647 is a wasteful number, since it uses less digits than its factorization.

168144647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15285888.

The product of its digits is 129024, while the sum is 41.

The square root of 168144647 is about 12967.0600754373. The cubic root of 168144647 is about 551.9431510015.

The spelling of 168144647 in words is "one hundred sixty-eight million, one hundred forty-four thousand, six hundred forty-seven".