242643843 has 20 divisors (see below), whose sum is σ = 390351808. Its totient is φ = 149318640.

The previous prime is 242643829. The next prime is 242643887. The reversal of 242643843 is 348346242.

242643843 is a `hidden beast` number, since 2 + 4 + 2 + 643 + 8 + 4 + 3 = 666.

It is not a de Polignac number, because 242643843 - 2⁴ = 242643827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242643798 and 242643807.

It is not an unprimeable number, because it can be changed into a prime (242643893) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 114163 + ... + 116268.

Almost surely, 2^242643843 is an apocalyptic number.

242643843 is a deficient number, since it is larger than the sum of its proper divisors (147707965).

242643843 is a wasteful number, since it uses less digits than its factorization.

242643843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230456 (or 230447 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

The square root of 242643843 is about 15577.0293380991. The cubic root of 242643843 is about 623.7201268954.

The spelling of 242643843 in words is "two hundred forty-two million, six hundred forty-three thousand, eight hundred forty-three".