256886087 has 2 divisors, whose sum is σ = 256886088. Its totient is φ = 256886086.

The previous prime is 256886081. The next prime is 256886093. The reversal of 256886087 is 780688652.

It is a balanced prime because it is at equal distance from previous prime (256886081) and next prime (256886093).

It is a cyclic number.

It is not a de Polignac number, because 256886087 - 2¹⁴ = 256869703 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 (256886081) 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, 128443043 + 128443044.

It is an arithmetic number, because the mean of its divisors is an integer number (128443044).

Almost surely, 2^256886087 is an apocalyptic number.

256886087 is a deficient number, since it is larger than the sum of its proper divisors (1).

256886087 is an equidigital number, since it uses as much as digits as its factorization.

256886087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The square root of 256886087 is about 16027.6662992464. Note that the first 3 decimals coincide. The cubic root of 256886087 is about 635.6921685478.

The spelling of 256886087 in words is "two hundred fifty-six million, eight hundred eighty-six thousand, eighty-seven".