918318143 has 4 divisors (see below), whose sum is σ = 919229280. Its totient is φ = 917407008.

The previous prime is 918318131. The next prime is 918318169. The reversal of 918318143 is 341813819.

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 918318143 - 2²⁰ = 917269567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 918318097 and 918318106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (918318113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454055 + ... + 456072.

It is an arithmetic number, because the mean of its divisors is an integer number (229807320).

Almost surely, 2^918318143 is an apocalyptic number.

918318143 is a deficient number, since it is larger than the sum of its proper divisors (911137).

918318143 is a wasteful number, since it uses less digits than its factorization.

918318143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911136.

The product of its digits is 20736, while the sum is 38.

The square root of 918318143 is about 30303.7645021209. The cubic root of 918318143 is about 971.9957997273.

The spelling of 918318143 in words is "nine hundred eighteen million, three hundred eighteen thousand, one hundred forty-three".