256585783 has 2 divisors, whose sum is σ = 256585784. Its totient is φ = 256585782.

The previous prime is 256585751. The next prime is 256585829. The reversal of 256585783 is 387585652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256585783 - 2⁵ = 256585751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256585733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128292891 + 128292892.

It is an arithmetic number, because the mean of its divisors is an integer number (128292892).

Almost surely, 2^256585783 is an apocalyptic number.

256585783 is a deficient number, since it is larger than the sum of its proper divisors (1).

256585783 is an equidigital number, since it uses as much as digits as its factorization.

256585783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016000, while the sum is 49.

The square root of 256585783 is about 16018.2952588595. The cubic root of 256585783 is about 635.4443604754. Note that the first 3 decimals are identical.

The spelling of 256585783 in words is "two hundred fifty-six million, five hundred eighty-five thousand, seven hundred eighty-three".