256329473 has 2 divisors, whose sum is σ = 256329474. Its totient is φ = 256329472.

The previous prime is 256329467. The next prime is 256329497. The reversal of 256329473 is 374923652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232044289 + 24285184 = 15233^2 + 4928^2 .

It is a cyclic number.

It is not a de Polignac number, because 256329473 - 2¹⁴ = 256313089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 256329473.

It is not a weakly prime, because it can be changed into another prime (256329413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128164736 + 128164737.

It is an arithmetic number, because the mean of its divisors is an integer number (128164737).

Almost surely, 2^256329473 is an apocalyptic number.

It is an amenable number.

256329473 is a deficient number, since it is larger than the sum of its proper divisors (1).

256329473 is an equidigital number, since it uses as much as digits as its factorization.

256329473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 41.

The square root of 256329473 is about 16010.2927206219. The cubic root of 256329473 is about 635.2327028586.

The spelling of 256329473 in words is "two hundred fifty-six million, three hundred twenty-nine thousand, four hundred seventy-three".