259797 has 4 divisors (see below), whose sum is σ = 346400. Its totient is φ = 173196.

The previous prime is 259783. The next prime is 259801. The reversal of 259797 is 797952.

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 not a de Polignac number, because 259797 - 2⁴ = 259781 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43297 + ... + 43302.

It is an arithmetic number, because the mean of its divisors is an integer number (86600).

2²⁵⁹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

259797 is a deficient number, since it is larger than the sum of its proper divisors (86603).

259797 is an equidigital number, since it uses as much as digits as its factorization.

259797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86602.

The product of its digits is 39690, while the sum is 39.

The square root of 259797 is about 509.7028546124. The cubic root of 259797 is about 63.8084277871.

The spelling of 259797 in words is "two hundred fifty-nine thousand, seven hundred ninety-seven".