168405345 has 16 divisors (see below), whose sum is σ = 299387520. Its totient is φ = 89816112.

The previous prime is 168405331. The next prime is 168405353. The reversal of 168405345 is 543504861.

It is a happy number.

It is not a de Polignac number, because 168405345 - 2⁷ = 168405217 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 623589 + ... + 623858.

It is an arithmetic number, because the mean of its divisors is an integer number (18711720).

Almost surely, 2^168405345 is an apocalyptic number.

168405345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168405345 is a deficient number, since it is larger than the sum of its proper divisors (130982175).

168405345 is a wasteful number, since it uses less digits than its factorization.

168405345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247461 (or 1247455 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 168405345 is about 12977.1084991997. The cubic root of 168405345 is about 552.2282550824.

The spelling of 168405345 in words is "one hundred sixty-eight million, four hundred five thousand, three hundred forty-five".