275649289 has 2 divisors, whose sum is σ = 275649290. Its totient is φ = 275649288.

The previous prime is 275649277. The next prime is 275649317. The reversal of 275649289 is 982946572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215120889 + 60528400 = 14667^2 + 7780^2 .

It is a cyclic number.

It is not a de Polignac number, because 275649289 - 2⁷ = 275649161 is a prime.

It is not a weakly prime, because it can be changed into another prime (275649229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137824644 + 137824645.

It is an arithmetic number, because the mean of its divisors is an integer number (137824645).

Almost surely, 2^275649289 is an apocalyptic number.

It is an amenable number.

275649289 is a deficient number, since it is larger than the sum of its proper divisors (1).

275649289 is an equidigital number, since it uses as much as digits as its factorization.

275649289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 52.

The square root of 275649289 is about 16602.6892098840. The cubic root of 275649289 is about 650.8071149325.

The spelling of 275649289 in words is "two hundred seventy-five million, six hundred forty-nine thousand, two hundred eighty-nine".