256168823 has 2 divisors, whose sum is σ = 256168824. Its totient is φ = 256168822.

The previous prime is 256168763. The next prime is 256168859. The reversal of 256168823 is 328861652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256168823 - 2¹⁰ = 256167799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256165823) 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, 128084411 + 128084412.

It is an arithmetic number, because the mean of its divisors is an integer number (128084412).

Almost surely, 2^256168823 is an apocalyptic number.

256168823 is a deficient number, since it is larger than the sum of its proper divisors (1).

256168823 is an equidigital number, since it uses as much as digits as its factorization.

256168823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The square root of 256168823 is about 16005.2748492489. The cubic root of 256168823 is about 635.0999681411.

The spelling of 256168823 in words is "two hundred fifty-six million, one hundred sixty-eight thousand, eight hundred twenty-three".