255604997 has 2 divisors, whose sum is σ = 255604998. Its totient is φ = 255604996.

The previous prime is 255604969. The next prime is 255605017. The reversal of 255604997 is 799406552.

255604997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176199076 + 79405921 = 13274^2 + 8911^2 .

It is a cyclic number.

It is not a de Polignac number, because 255604997 - 2¹⁸ = 255342853 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 (255604597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127802498 + 127802499.

It is an arithmetic number, because the mean of its divisors is an integer number (127802499).

Almost surely, 2^255604997 is an apocalyptic number.

It is an amenable number.

255604997 is a deficient number, since it is larger than the sum of its proper divisors (1).

255604997 is an equidigital number, since it uses as much as digits as its factorization.

255604997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 680400, while the sum is 47.

The square root of 255604997 is about 15987.6513909955. The cubic root of 255604997 is about 634.6336754998.

The spelling of 255604997 in words is "two hundred fifty-five million, six hundred four thousand, nine hundred ninety-seven".