259999999 has 16 divisors (see below), whose sum is σ = 309749248. Its totient is φ = 213583392.

The previous prime is 259999991. The next prime is 260000011. The reversal of 259999999 is 999999952.

It is a cyclic number.

It is not a de Polignac number, because 259999999 - 2³ = 259999991 is a prime.

It is a Duffinian number.

259999999 is a modest number, since divided by 99999 gives 2599 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259999991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9862 + ... + 24844.

It is an arithmetic number, because the mean of its divisors is an integer number (19359328).

Almost surely, 2^259999999 is an apocalyptic number.

259999999 is a deficient number, since it is larger than the sum of its proper divisors (49749249).

259999999 is a wasteful number, since it uses less digits than its factorization.

259999999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15094.

The product of its digits is 47829690, while the sum is 70.

The square root of 259999999 is about 16124.5154655884. The cubic root of 259999999 is about 638.2504290677.

The spelling of 259999999 in words is "two hundred fifty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".