275257289 has 2 divisors, whose sum is σ = 275257290. Its totient is φ = 275257288.

The previous prime is 275257247. The next prime is 275257309. The reversal of 275257289 is 982752572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138180025 + 137077264 = 11755^2 + 11708^2 .

It is a cyclic number.

It is not a de Polignac number, because 275257289 - 2⁸ = 275257033 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (275257889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137628644 + 137628645.

It is an arithmetic number, because the mean of its divisors is an integer number (137628645).

Almost surely, 2^275257289 is an apocalyptic number.

It is an amenable number.

275257289 is a deficient number, since it is larger than the sum of its proper divisors (1).

275257289 is an equidigital number, since it uses as much as digits as its factorization.

275257289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705600, while the sum is 47.

The square root of 275257289 is about 16590.8796933737. The cubic root of 275257289 is about 650.4984649821.

The spelling of 275257289 in words is "two hundred seventy-five million, two hundred fifty-seven thousand, two hundred eighty-nine".