255330389 has 2 divisors, whose sum is σ = 255330390. Its totient is φ = 255330388.

The previous prime is 255330373. The next prime is 255330391. The reversal of 255330389 is 983033552.

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., 250177489 + 5152900 = 15817^2 + 2270^2 .

It is a cyclic number.

It is not a de Polignac number, because 255330389 - 2⁴ = 255330373 is a prime.

Together with 255330391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255330319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127665194 + 127665195.

It is an arithmetic number, because the mean of its divisors is an integer number (127665195).

Almost surely, 2^255330389 is an apocalyptic number.

It is an amenable number.

255330389 is a deficient number, since it is larger than the sum of its proper divisors (1).

255330389 is an equidigital number, since it uses as much as digits as its factorization.

255330389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 255330389 is about 15979.0609548872. The cubic root of 255330389 is about 634.4063221821.

The spelling of 255330389 in words is "two hundred fifty-five million, three hundred thirty thousand, three hundred eighty-nine".