243203240587 has 2 divisors, whose sum is σ = 243203240588. Its totient is φ = 243203240586.

The previous prime is 243203240477. The next prime is 243203240629. The reversal of 243203240587 is 785042302342.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243203240587 is a prime.

It is not a weakly prime, because it can be changed into another prime (243203340587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121601620293 + 121601620294.

It is an arithmetic number, because the mean of its divisors is an integer number (121601620294).

Almost surely, 2^243203240587 is an apocalyptic number.

243203240587 is a deficient number, since it is larger than the sum of its proper divisors (1).

243203240587 is an equidigital number, since it uses as much as digits as its factorization.

243203240587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 40.

The spelling of 243203240587 in words is "two hundred forty-three billion, two hundred three million, two hundred forty thousand, five hundred eighty-seven".