255686597 has 2 divisors, whose sum is σ = 255686598. Its totient is φ = 255686596.

The previous prime is 255686551. The next prime is 255686609. The reversal of 255686597 is 795686552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228584161 + 27102436 = 15119^2 + 5206^2 .

It is a cyclic number.

It is not a de Polignac number, because 255686597 - 2²⁶ = 188577733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255686507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127843298 + 127843299.

It is an arithmetic number, because the mean of its divisors is an integer number (127843299).

Almost surely, 2^255686597 is an apocalyptic number.

It is an amenable number.

255686597 is a deficient number, since it is larger than the sum of its proper divisors (1).

255686597 is an equidigital number, since it uses as much as digits as its factorization.

255686597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536000, while the sum is 53.

The square root of 255686597 is about 15990.2031569333. The cubic root of 255686597 is about 634.7012023463.

The spelling of 255686597 in words is "two hundred fifty-five million, six hundred eighty-six thousand, five hundred ninety-seven".