255368989 has 2 divisors, whose sum is σ = 255368990. Its totient is φ = 255368988.

The previous prime is 255368969. The next prime is 255369007. The reversal of 255368989 is 989863552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131492089 + 123876900 = 11467^2 + 11130^2 .

It is a cyclic number.

It is not a de Polignac number, because 255368989 - 2¹³ = 255360797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255368909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127684494 + 127684495.

It is an arithmetic number, because the mean of its divisors is an integer number (127684495).

Almost surely, 2^255368989 is an apocalyptic number.

It is an amenable number.

255368989 is a deficient number, since it is larger than the sum of its proper divisors (1).

255368989 is an equidigital number, since it uses as much as digits as its factorization.

255368989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 55.

The square root of 255368989 is about 15980.2687399180. The cubic root of 255368989 is about 634.4382897180.

The spelling of 255368989 in words is "two hundred fifty-five million, three hundred sixty-eight thousand, nine hundred eighty-nine".