168912001 has 4 divisors (see below), whose sum is σ = 169302532. Its totient is φ = 168521472.

The previous prime is 168911971. The next prime is 168912011. The reversal of 168912001 is 100219861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100219861 = 7 ⋅14317123.

It can be written as a sum of positive squares in 2 ways, for example, as 69889600 + 99022401 = 8360^2 + 9951^2 .

It is a cyclic number.

It is not a de Polignac number, because 168912001 - 2¹³ = 168903809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168912011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194616 + ... + 195481.

It is an arithmetic number, because the mean of its divisors is an integer number (42325633).

Almost surely, 2^168912001 is an apocalyptic number.

It is an amenable number.

168912001 is a deficient number, since it is larger than the sum of its proper divisors (390531).

168912001 is an equidigital number, since it uses as much as digits as its factorization.

168912001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390530.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 168912001 is about 12996.6149823714. The cubic root of 168912001 is about 552.7815028423.

The spelling of 168912001 in words is "one hundred sixty-eight million, nine hundred twelve thousand, one".