168393139 has 16 divisors (see below), whose sum is σ = 175271040. Its totient is φ = 161704000.

The previous prime is 168393107. The next prime is 168393149. The reversal of 168393139 is 931393861.

It is a happy number.

168393139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 168393139 - 2⁵ = 168393107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168393095 and 168393104.

It is not an unprimeable number, because it can be changed into a prime (168393149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 670764 + ... + 671014.

It is an arithmetic number, because the mean of its divisors is an integer number (10954440).

Almost surely, 2^168393139 is an apocalyptic number.

168393139 is a deficient number, since it is larger than the sum of its proper divisors (6877901).

168393139 is a wasteful number, since it uses less digits than its factorization.

168393139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530.

The product of its digits is 104976, while the sum is 43.

The square root of 168393139 is about 12976.6382010134. The cubic root of 168393139 is about 552.2149129466.

The spelling of 168393139 in words is "one hundred sixty-eight million, three hundred ninety-three thousand, one hundred thirty-nine".