259887889 has 8 divisors (see below), whose sum is σ = 273423528. Its totient is φ = 246695040.

The previous prime is 259887869. The next prime is 259887917. The reversal of 259887889 is 988788952.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11289600 + 248598289 = 3360^2 + 15767^2 .

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 259887889 - 2¹⁵ = 259855121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 259887889.

It is not an unprimeable number, because it can be changed into a prime (259887809) 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, 84142 + ... + 87175.

It is an arithmetic number, because the mean of its divisors is an integer number (34177941).

Almost surely, 2^259887889 is an apocalyptic number.

It is an amenable number.

259887889 is a deficient number, since it is larger than the sum of its proper divisors (13535639).

259887889 is a wasteful number, since it uses less digits than its factorization.

259887889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171395.

The product of its digits is 23224320, while the sum is 64.

The square root of 259887889 is about 16121.0387072298. The cubic root of 259887889 is about 638.1586796538.

The spelling of 259887889 in words is "two hundred fifty-nine million, eight hundred eighty-seven thousand, eight hundred eighty-nine".