259440017 has 4 divisors (see below), whose sum is σ = 259906356. Its totient is φ = 258973680.

The previous prime is 259439993. The next prime is 259440031. The reversal of 259440017 is 710044952.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17606416 + 241833601 = 4196^2 + 15551^2 .

It is a cyclic number.

It is not a de Polignac number, because 259440017 - 2²² = 255245713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (259440037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232334 + ... + 233447.

It is an arithmetic number, because the mean of its divisors is an integer number (64976589).

Almost surely, 2^259440017 is an apocalyptic number.

It is an amenable number.

259440017 is a deficient number, since it is larger than the sum of its proper divisors (466339).

259440017 is an equidigital number, since it uses as much as digits as its factorization.

259440017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466338.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 259440017 is about 16107.1418010769. The cubic root of 259440017 is about 637.7918833581.

Adding to 259440017 its reverse (710044952), we get a palindrome (969484969).

The spelling of 259440017 in words is "two hundred fifty-nine million, four hundred forty thousand, seventeen".