168905001 has 16 divisors (see below), whose sum is σ = 229193280. Its totient is φ = 110626560.

The previous prime is 168904999. The next prime is 168905029. The reversal of 168905001 is 100509861.

It is a happy number.

It is not a de Polignac number, because 168905001 - 2¹ = 168904999 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 168905001.

It is not an unprimeable number, because it can be changed into a prime (168905071) 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, 41581 + ... + 45461.

It is an arithmetic number, because the mean of its divisors is an integer number (14324580).

Almost surely, 2^168905001 is an apocalyptic number.

It is an amenable number.

168905001 is a deficient number, since it is larger than the sum of its proper divisors (60288279).

168905001 is a wasteful number, since it uses less digits than its factorization.

168905001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 168905001 is about 12996.3456786898. The cubic root of 168905001 is about 552.7738666689.

The spelling of 168905001 in words is "one hundred sixty-eight million, nine hundred five thousand, one".