243864873 has 48 divisors (see below), whose sum is σ = 411465600. Its totient is φ = 136311552.

The previous prime is 243864871. The next prime is 243864889. The reversal of 243864873 is 378468342.

It is not a de Polignac number, because 243864873 - 2¹ = 243864871 is a prime.

It is a super-2 number, since 2×243864873² = 118940152566612258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243864871) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 778965 + ... + 779277.

It is an arithmetic number, because the mean of its divisors is an integer number (8572200).

Almost surely, 2^243864873 is an apocalyptic number.

It is an amenable number.

243864873 is a deficient number, since it is larger than the sum of its proper divisors (167600727).

243864873 is a wasteful number, since it uses less digits than its factorization.

243864873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 555 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 243864873 is about 15616.1734429405. The cubic root of 243864873 is about 624.7646029790.

The spelling of 243864873 in words is "two hundred forty-three million, eight hundred sixty-four thousand, eight hundred seventy-three".