255805787 has 2 divisors, whose sum is σ = 255805788. Its totient is φ = 255805786.

The previous prime is 255805741. The next prime is 255805841. The reversal of 255805787 is 787508552.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255805787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (255805717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127902893 + 127902894.

It is an arithmetic number, because the mean of its divisors is an integer number (127902894).

Almost surely, 2^255805787 is an apocalyptic number.

255805787 is a deficient number, since it is larger than the sum of its proper divisors (1).

255805787 is an equidigital number, since it uses as much as digits as its factorization.

255805787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784000, while the sum is 47.

The square root of 255805787 is about 15993.9296922301. The cubic root of 255805787 is about 634.7998104148.

The spelling of 255805787 in words is "two hundred fifty-five million, eight hundred five thousand, seven hundred eighty-seven".