256362289 has 2 divisors, whose sum is σ = 256362290. Its totient is φ = 256362288.

The previous prime is 256362283. The next prime is 256362313. The reversal of 256362289 is 982263652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 244390689 + 11971600 = 15633^2 + 3460^2 .

It is a cyclic number.

It is not a de Polignac number, because 256362289 - 2¹¹ = 256360241 is a prime.

It is not a weakly prime, because it can be changed into another prime (256362283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128181144 + 128181145.

It is an arithmetic number, because the mean of its divisors is an integer number (128181145).

Almost surely, 2^256362289 is an apocalyptic number.

It is an amenable number.

256362289 is a deficient number, since it is larger than the sum of its proper divisors (1).

256362289 is an equidigital number, since it uses as much as digits as its factorization.

256362289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The square root of 256362289 is about 16011.3175285484. The cubic root of 256362289 is about 635.2598097777.

The spelling of 256362289 in words is "two hundred fifty-six million, three hundred sixty-two thousand, two hundred eighty-nine".