168420201 has 4 divisors (see below), whose sum is σ = 224560272. Its totient is φ = 112280132.

The previous prime is 168420149. The next prime is 168420221. The reversal of 168420201 is 102024861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 102024861 = 3 ⋅34008287.

It is a cyclic number.

It is not a de Polignac number, because 168420201 - 2⁷ = 168420073 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (168420221) 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 3 ways as a sum of consecutive naturals, for example, 28070031 + ... + 28070036.

It is an arithmetic number, because the mean of its divisors is an integer number (56140068).

Almost surely, 2^168420201 is an apocalyptic number.

It is an amenable number.

168420201 is a deficient number, since it is larger than the sum of its proper divisors (56140071).

168420201 is an equidigital number, since it uses as much as digits as its factorization.

168420201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56140070.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 168420201 is about 12977.6808791093. The cubic root of 168420201 is about 552.2444930106.

The spelling of 168420201 in words is "one hundred sixty-eight million, four hundred twenty thousand, two hundred one".