489565987 has 2 divisors, whose sum is σ = 489565988. Its totient is φ = 489565986.

The previous prime is 489565963. The next prime is 489565997. The reversal of 489565987 is 789565984.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 489565987 - 2⁷ = 489565859 is a prime.

It is not a weakly prime, because it can be changed into another prime (489565957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244782993 + 244782994.

It is an arithmetic number, because the mean of its divisors is an integer number (244782994).

Almost surely, 2^489565987 is an apocalyptic number.

489565987 is a deficient number, since it is larger than the sum of its proper divisors (1).

489565987 is an equidigital number, since it uses as much as digits as its factorization.

489565987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 61.

The square root of 489565987 is about 22126.1380950224. The cubic root of 489565987 is about 788.1406826863.

The spelling of 489565987 in words is "four hundred eighty-nine million, five hundred sixty-five thousand, nine hundred eighty-seven".