255664597 has 2 divisors, whose sum is σ = 255664598. Its totient is φ = 255664596.

The previous prime is 255664583. The next prime is 255664601. The reversal of 255664597 is 795466552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243547236 + 12117361 = 15606^2 + 3481^2 .

It is a cyclic number.

It is not a de Polignac number, because 255664597 - 2¹⁵ = 255631829 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255664597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255664517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127832298 + 127832299.

It is an arithmetic number, because the mean of its divisors is an integer number (127832299).

Almost surely, 2^255664597 is an apocalyptic number.

It is an amenable number.

255664597 is a deficient number, since it is larger than the sum of its proper divisors (1).

255664597 is an equidigital number, since it uses as much as digits as its factorization.

255664597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268000, while the sum is 49.

The square root of 255664597 is about 15989.5152209190. The cubic root of 255664597 is about 634.6829979936.

The spelling of 255664597 in words is "two hundred fifty-five million, six hundred sixty-four thousand, five hundred ninety-seven".