168326139 has 4 divisors (see below), whose sum is σ = 224434856. Its totient is φ = 112217424.

The previous prime is 168326131. The next prime is 168326141. The reversal of 168326139 is 931623861.

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

It is not a de Polignac number, because 168326139 - 2³ = 168326131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168326097 and 168326106.

It is not an unprimeable number, because it can be changed into a prime (168326131) 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, 28054354 + ... + 28054359.

It is an arithmetic number, because the mean of its divisors is an integer number (56108714).

Almost surely, 2^168326139 is an apocalyptic number.

168326139 is a deficient number, since it is larger than the sum of its proper divisors (56108717).

168326139 is an equidigital number, since it uses as much as digits as its factorization.

168326139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56108716.

The product of its digits is 46656, while the sum is 39.

The square root of 168326139 is about 12974.0563818722. The cubic root of 168326139 is about 552.1416650945.

The spelling of 168326139 in words is "one hundred sixty-eight million, three hundred twenty-six thousand, one hundred thirty-nine".