1218434163 has 4 divisors (see below), whose sum is σ = 1624578888. Its totient is φ = 812289440.

The previous prime is 1218434141. The next prime is 1218434179. The reversal of 1218434163 is 3614348121.

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 1218434163 - 2⁶ = 1218434099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1218434263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203072358 + ... + 203072363.

It is an arithmetic number, because the mean of its divisors is an integer number (406144722).

Almost surely, 2^1218434163 is an apocalyptic number.

1218434163 is a deficient number, since it is larger than the sum of its proper divisors (406144725).

1218434163 is an equidigital number, since it uses as much as digits as its factorization.

1218434163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406144724.

The product of its digits is 13824, while the sum is 33.

The square root of 1218434163 is about 34906.0763048498. The cubic root of 1218434163 is about 1068.0723914305.

The spelling of 1218434163 in words is "one billion, two hundred eighteen million, four hundred thirty-four thousand, one hundred sixty-three".