259631 has 2 divisors, whose sum is σ = 259632. Its totient is φ = 259630.

The previous prime is 259627. The next prime is 259639. The reversal of 259631 is 136952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 259631 - 2² = 259627 is a prime.

It is a super-2 number, since 2×259631² = 134816512322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 259631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (259639) 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 as a sum of consecutive naturals, namely, 129815 + 129816.

It is an arithmetic number, because the mean of its divisors is an integer number (129816).

2²⁵⁹⁶³¹ is an apocalyptic number.

259631 is a deficient number, since it is larger than the sum of its proper divisors (1).

259631 is an equidigital number, since it uses as much as digits as its factorization.

259631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 26.

The square root of 259631 is about 509.5399886172. The cubic root of 259631 is about 63.7948345382.

The spelling of 259631 in words is "two hundred fifty-nine thousand, six hundred thirty-one".