259656671 has 2 divisors, whose sum is σ = 259656672. Its totient is φ = 259656670.

The previous prime is 259656667. The next prime is 259656701. The reversal of 259656671 is 176656952.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 259656671 - 2² = 259656667 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (259656611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129828335 + 129828336.

It is an arithmetic number, because the mean of its divisors is an integer number (129828336).

Almost surely, 2^259656671 is an apocalyptic number.

259656671 is a deficient number, since it is larger than the sum of its proper divisors (1).

259656671 is an equidigital number, since it uses as much as digits as its factorization.

259656671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 680400, while the sum is 47.

The square root of 259656671 is about 16113.8657993667. The cubic root of 259656671 is about 637.9693703911.

The spelling of 259656671 in words is "two hundred fifty-nine million, six hundred fifty-six thousand, six hundred seventy-one".