256503349 has 2 divisors, whose sum is σ = 256503350. Its totient is φ = 256503348.

The previous prime is 256503329. The next prime is 256503367. The reversal of 256503349 is 943305652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185640625 + 70862724 = 13625^2 + 8418^2 .

It is a cyclic number.

It is not a de Polignac number, because 256503349 - 2²⁵ = 222948917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256503329) 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, 128251674 + 128251675.

It is an arithmetic number, because the mean of its divisors is an integer number (128251675).

Almost surely, 2^256503349 is an apocalyptic number.

It is an amenable number.

256503349 is a deficient number, since it is larger than the sum of its proper divisors (1).

256503349 is an equidigital number, since it uses as much as digits as its factorization.

256503349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 256503349 is about 16015.7219319018. The cubic root of 256503349 is about 635.3763028841.

The spelling of 256503349 in words is "two hundred fifty-six million, five hundred three thousand, three hundred forty-nine".