259516891 has 2 divisors, whose sum is σ = 259516892. Its totient is φ = 259516890.

The previous prime is 259516867. The next prime is 259516897. The reversal of 259516891 is 198615952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 259516891 - 2²¹ = 257419739 is a prime.

It is not a weakly prime, because it can be changed into another prime (259516897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129758445 + 129758446.

It is an arithmetic number, because the mean of its divisors is an integer number (129758446).

Almost surely, 2^259516891 is an apocalyptic number.

259516891 is a deficient number, since it is larger than the sum of its proper divisors (1).

259516891 is an equidigital number, since it uses as much as digits as its factorization.

259516891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 46.

The square root of 259516891 is about 16109.5279570818. The cubic root of 259516891 is about 637.8548712913.

The spelling of 259516891 in words is "two hundred fifty-nine million, five hundred sixteen thousand, eight hundred ninety-one".