243115414987 has 2 divisors, whose sum is σ = 243115414988. Its totient is φ = 243115414986.

The previous prime is 243115414981. The next prime is 243115414991. The reversal of 243115414987 is 789414511342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243115414987 - 2¹⁵ = 243115382219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243115414987.

It is not a weakly prime, because it can be changed into another prime (243115414981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121557707493 + 121557707494.

It is an arithmetic number, because the mean of its divisors is an integer number (121557707494).

Almost surely, 2^243115414987 is an apocalyptic number.

243115414987 is a deficient number, since it is larger than the sum of its proper divisors (1).

243115414987 is an equidigital number, since it uses as much as digits as its factorization.

243115414987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 49.

The spelling of 243115414987 in words is "two hundred forty-three billion, one hundred fifteen million, four hundred fourteen thousand, nine hundred eighty-seven".