168439385 has 16 divisors (see below), whose sum is σ = 207571584. Its totient is φ = 131144832.

The previous prime is 168439379. The next prime is 168439387. The reversal of 168439385 is 583934861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168439385 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (168439387) 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, 66044 + ... + 68546.

It is an arithmetic number, because the mean of its divisors is an integer number (12973224).

Almost surely, 2^168439385 is an apocalyptic number.

It is an amenable number.

168439385 is a deficient number, since it is larger than the sum of its proper divisors (39132199).

168439385 is a wasteful number, since it uses less digits than its factorization.

168439385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2864.

The product of its digits is 622080, while the sum is 47.

The square root of 168439385 is about 12978.4199731708. The cubic root of 168439385 is about 552.2654601236.

The spelling of 168439385 in words is "one hundred sixty-eight million, four hundred thirty-nine thousand, three hundred eighty-five".