256827583 has 2 divisors, whose sum is σ = 256827584. Its totient is φ = 256827582.

The previous prime is 256827581. The next prime is 256827601. The reversal of 256827583 is 385728652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256827583 - 2¹ = 256827581 is a prime.

Together with 256827581, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256827581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128413791 + 128413792.

It is an arithmetic number, because the mean of its divisors is an integer number (128413792).

Almost surely, 2^256827583 is an apocalyptic number.

256827583 is a deficient number, since it is larger than the sum of its proper divisors (1).

256827583 is an equidigital number, since it uses as much as digits as its factorization.

256827583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 46.

The square root of 256827583 is about 16025.8411011716. The cubic root of 256827583 is about 635.6439067433.

The spelling of 256827583 in words is "two hundred fifty-six million, eight hundred twenty-seven thousand, five hundred eighty-three".