168336139 has 2 divisors, whose sum is σ = 168336140. Its totient is φ = 168336138.

The previous prime is 168336137. The next prime is 168336211. The reversal of 168336139 is 931633861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168336139 - 2¹ = 168336137 is a prime.

Together with 168336137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (168336137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84168069 + 84168070.

It is an arithmetic number, because the mean of its divisors is an integer number (84168070).

Almost surely, 2^168336139 is an apocalyptic number.

168336139 is a deficient number, since it is larger than the sum of its proper divisors (1).

168336139 is an equidigital number, since it uses as much as digits as its factorization.

168336139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 40.

The square root of 168336139 is about 12974.4417606308. The cubic root of 168336139 is about 552.1525988436.

The spelling of 168336139 in words is "one hundred sixty-eight million, three hundred thirty-six thousand, one hundred thirty-nine".