242017987 has 2 divisors, whose sum is σ = 242017988. Its totient is φ = 242017986.

The previous prime is 242017969. The next prime is 242018009. The reversal of 242017987 is 789710242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242017987 - 2¹⁹ = 241493699 is a prime.

It is not a weakly prime, because it can be changed into another prime (242017907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121008993 + 121008994.

It is an arithmetic number, because the mean of its divisors is an integer number (121008994).

Almost surely, 2^242017987 is an apocalyptic number.

242017987 is a deficient number, since it is larger than the sum of its proper divisors (1).

242017987 is an equidigital number, since it uses as much as digits as its factorization.

242017987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 242017987 is about 15556.9272994380. The cubic root of 242017987 is about 623.1834073413.

The spelling of 242017987 in words is "two hundred forty-two million, seventeen thousand, nine hundred eighty-seven".