259988291 has 4 divisors (see below), whose sum is σ = 260444184. Its totient is φ = 259532400.

The previous prime is 259988273. The next prime is 259988303. The reversal of 259988291 is 192889952.

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 259988291 - 2¹⁰ = 259987267 is a prime.

It is a super-2 number, since 2×259988291² = 135187822914201362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (259988221) 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, 227090 + ... + 228231.

It is an arithmetic number, because the mean of its divisors is an integer number (65111046).

Almost surely, 2^259988291 is an apocalyptic number.

259988291 is a deficient number, since it is larger than the sum of its proper divisors (455893).

259988291 is an equidigital number, since it uses as much as digits as its factorization.

259988291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455892.

The product of its digits is 933120, while the sum is 53.

The square root of 259988291 is about 16124.1524118324. The cubic root of 259988291 is about 638.2408486213.

The spelling of 259988291 in words is "two hundred fifty-nine million, nine hundred eighty-eight thousand, two hundred ninety-one".