168144673 has 4 divisors (see below), whose sum is σ = 171317268. Its totient is φ = 164972080.

The previous prime is 168144667. The next prime is 168144701. The reversal of 168144673 is 376441861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376441861 = 2179 ⋅172759.

It can be written as a sum of positive squares in 2 ways, for example, as 144408289 + 23736384 = 12017^2 + 4872^2 .

It is a cyclic number.

It is not a de Polignac number, because 168144673 - 2²¹ = 166047521 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1586218 + ... + 1586323.

It is an arithmetic number, because the mean of its divisors is an integer number (42829317).

Almost surely, 2^168144673 is an apocalyptic number.

It is an amenable number.

168144673 is a deficient number, since it is larger than the sum of its proper divisors (3172595).

168144673 is an equidigital number, since it uses as much as digits as its factorization.

168144673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3172594.

The product of its digits is 96768, while the sum is 40.

The square root of 168144673 is about 12967.0610779775. The cubic root of 168144673 is about 551.9431794503.

The spelling of 168144673 in words is "one hundred sixty-eight million, one hundred forty-four thousand, six hundred seventy-three".