259009439 has 4 divisors (see below), whose sum is σ = 278933256. Its totient is φ = 239085624.

The previous prime is 259009393. The next prime is 259009441. The reversal of 259009439 is 934900952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 259009439 - 2¹² = 259005343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 259009396 and 259009405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259009939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9961889 + ... + 9961914.

It is an arithmetic number, because the mean of its divisors is an integer number (69733314).

Almost surely, 2^259009439 is an apocalyptic number.

259009439 is a deficient number, since it is larger than the sum of its proper divisors (19923817).

259009439 is a wasteful number, since it uses less digits than its factorization.

259009439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19923816.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 259009439 is about 16093.7701922203. The cubic root of 259009439 is about 637.4388522152.

It can be divided in two parts, 25900943 and 9, that added together give a palindrome (25900952).

The spelling of 259009439 in words is "two hundred fifty-nine million, nine thousand, four hundred thirty-nine".