243936887 has 2 divisors, whose sum is σ = 243936888. Its totient is φ = 243936886.

The previous prime is 243936881. The next prime is 243936929. The reversal of 243936887 is 788639342.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 243936887 - 2⁸ = 243936631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243936881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121968443 + 121968444.

It is an arithmetic number, because the mean of its divisors is an integer number (121968444).

Almost surely, 2^243936887 is an apocalyptic number.

243936887 is a deficient number, since it is larger than the sum of its proper divisors (1).

243936887 is an equidigital number, since it uses as much as digits as its factorization.

243936887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 50.

The square root of 243936887 is about 15618.4790232596. The cubic root of 243936887 is about 624.8260951892.

The spelling of 243936887 in words is "two hundred forty-three million, nine hundred thirty-six thousand, eight hundred eighty-seven".