259869161 has 2 divisors, whose sum is σ = 259869162. Its totient is φ = 259869160.

The previous prime is 259869143. The next prime is 259869163. The reversal of 259869161 is 161968952.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145057936 + 114811225 = 12044^2 + 10715^2 .

It is a cyclic number.

It is not a de Polignac number, because 259869161 - 2⁶ = 259869097 is a prime.

Together with 259869163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (259869163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129934580 + 129934581.

It is an arithmetic number, because the mean of its divisors is an integer number (129934581).

Almost surely, 2^259869161 is an apocalyptic number.

It is an amenable number.

259869161 is a deficient number, since it is larger than the sum of its proper divisors (1).

259869161 is an equidigital number, since it uses as much as digits as its factorization.

259869161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 47.

The square root of 259869161 is about 16120.4578408927. The cubic root of 259869161 is about 638.1433503222.

The spelling of 259869161 in words is "two hundred fifty-nine million, eight hundred sixty-nine thousand, one hundred sixty-one".