259997 has 4 divisors (see below), whose sum is σ = 268416. Its totient is φ = 251580.

The previous prime is 259993. The next prime is 260003. The reversal of 259997 is 799952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 259997 - 2² = 259993 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259991) 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, 4163 + ... + 4224.

It is an arithmetic number, because the mean of its divisors is an integer number (67104).

2²⁵⁹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

259997 is a deficient number, since it is larger than the sum of its proper divisors (8419).

259997 is an equidigital number, since it uses as much as digits as its factorization.

259997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8418.

The product of its digits is 51030, while the sum is 41.

The square root of 259997 is about 509.8990096088. The cubic root of 259997 is about 63.8247975067.

The spelling of 259997 in words is "two hundred fifty-nine thousand, nine hundred ninety-seven".