168561203 has 4 divisors (see below), whose sum is σ = 169266720. Its totient is φ = 167855688.

The previous prime is 168561163. The next prime is 168561221. The reversal of 168561203 is 302165861.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 168561203 - 2⁶ = 168561139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168561203.

It is not an unprimeable number, because it can be changed into a prime (168561803) 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, 352400 + ... + 352877.

It is an arithmetic number, because the mean of its divisors is an integer number (42316680).

Almost surely, 2^168561203 is an apocalyptic number.

168561203 is a deficient number, since it is larger than the sum of its proper divisors (705517).

168561203 is an equidigital number, since it uses as much as digits as its factorization.

168561203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705516.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 168561203 is about 12983.1122231921. The cubic root of 168561203 is about 552.3985637165.

The spelling of 168561203 in words is "one hundred sixty-eight million, five hundred sixty-one thousand, two hundred three".