255000997 has 2 divisors, whose sum is σ = 255000998. Its totient is φ = 255000996.

The previous prime is 255000979. The next prime is 255001001. The reversal of 255000997 is 799000552.

Together with previous prime (255000979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253478241 + 1522756 = 15921^2 + 1234^2 .

It is a cyclic number.

It is not a de Polignac number, because 255000997 - 2⁷ = 255000869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255007997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127500498 + 127500499.

It is an arithmetic number, because the mean of its divisors is an integer number (127500499).

Almost surely, 2^255000997 is an apocalyptic number.

It is an amenable number.

255000997 is a deficient number, since it is larger than the sum of its proper divisors (1).

255000997 is an equidigital number, since it uses as much as digits as its factorization.

255000997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 255000997 is about 15968.7506399217. The cubic root of 255000997 is about 634.1333969821.

The spelling of 255000997 in words is "two hundred fifty-five million, nine hundred ninety-seven", and thus it is an aban number.