442367987 has 2 divisors, whose sum is σ = 442367988. Its totient is φ = 442367986.

The previous prime is 442367963. The next prime is 442368029. The reversal of 442367987 is 789763244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442367987 - 2¹⁰ = 442366963 is a prime.

It is not a weakly prime, because it can be changed into another prime (442367927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221183993 + 221183994.

It is an arithmetic number, because the mean of its divisors is an integer number (221183994).

Almost surely, 2^442367987 is an apocalyptic number.

442367987 is a deficient number, since it is larger than the sum of its proper divisors (1).

442367987 is an equidigital number, since it uses as much as digits as its factorization.

442367987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 50.

The square root of 442367987 is about 21032.5458991535. The cubic root of 442367987 is about 761.9524974808.

The spelling of 442367987 in words is "four hundred forty-two million, three hundred sixty-seven thousand, nine hundred eighty-seven".