168140345 has 8 divisors (see below), whose sum is σ = 201840576. Its totient is φ = 134464176.

The previous prime is 168140341. The next prime is 168140351. The reversal of 168140345 is 543041861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168140345 - 2² = 168140341 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168140341) 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 7 ways as a sum of consecutive naturals, for example, 18314 + ... + 25916.

It is an arithmetic number, because the mean of its divisors is an integer number (25230072).

Almost surely, 2^168140345 is an apocalyptic number.

It is an amenable number.

168140345 is a deficient number, since it is larger than the sum of its proper divisors (33700231).

168140345 is an equidigital number, since it uses as much as digits as its factorization.

168140345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12031.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 168140345 is about 12966.8941925197. The cubic root of 168140345 is about 551.9384437852.

The spelling of 168140345 in words is "one hundred sixty-eight million, one hundred forty thousand, three hundred forty-five".