259278961 has 2 divisors, whose sum is σ = 259278962. Its totient is φ = 259278960.

The previous prime is 259278907. The next prime is 259278967. The reversal of 259278961 is 169872952.

259278961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196868961 + 62410000 = 14031^2 + 7900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-259278961 is a prime.

It is not a weakly prime, because it can be changed into another prime (259278967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129639480 + 129639481.

It is an arithmetic number, because the mean of its divisors is an integer number (129639481).

Almost surely, 2^259278961 is an apocalyptic number.

It is an amenable number.

259278961 is a deficient number, since it is larger than the sum of its proper divisors (1).

259278961 is an equidigital number, since it uses as much as digits as its factorization.

259278961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The square root of 259278961 is about 16102.1415035392. The cubic root of 259278961 is about 637.6598792135.

The spelling of 259278961 in words is "two hundred fifty-nine million, two hundred seventy-eight thousand, nine hundred sixty-one".