259885987 has 8 divisors (see below), whose sum is σ = 277747056. Its totient is φ = 242310912.

The previous prime is 259885981. The next prime is 259885999. The reversal of 259885987 is 789588952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 259885987 - 2¹⁵ = 259853219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (259885981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69618 + ... + 73255.

It is an arithmetic number, because the mean of its divisors is an integer number (34718382).

Almost surely, 2^259885987 is an apocalyptic number.

259885987 is a deficient number, since it is larger than the sum of its proper divisors (17861069).

259885987 is a wasteful number, since it uses less digits than its factorization.

259885987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142997.

The product of its digits is 14515200, while the sum is 61.

The square root of 259885987 is about 16120.9797158858. The cubic root of 259885987 is about 638.1571228533.

The spelling of 259885987 in words is "two hundred fifty-nine million, eight hundred eighty-five thousand, nine hundred eighty-seven".