256348349 has 2 divisors, whose sum is σ = 256348350. Its totient is φ = 256348348.

The previous prime is 256348319. The next prime is 256348381. The reversal of 256348349 is 943843652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208600249 + 47748100 = 14443^2 + 6910^2 .

It is a cyclic number.

It is not a de Polignac number, because 256348349 - 2²⁰ = 255299773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256348319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128174174 + 128174175.

It is an arithmetic number, because the mean of its divisors is an integer number (128174175).

Almost surely, 2^256348349 is an apocalyptic number.

It is an amenable number.

256348349 is a deficient number, since it is larger than the sum of its proper divisors (1).

256348349 is an equidigital number, since it uses as much as digits as its factorization.

256348349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 44.

The square root of 256348349 is about 16010.8822055501. The cubic root of 256348349 is about 635.2482952367.

The spelling of 256348349 in words is "two hundred fifty-six million, three hundred forty-eight thousand, three hundred forty-nine".