255943729 has 2 divisors, whose sum is σ = 255943730. Its totient is φ = 255943728.

The previous prime is 255943673. The next prime is 255943733. The reversal of 255943729 is 927349552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250430625 + 5513104 = 15825^2 + 2348^2 .

It is a cyclic number.

It is not a de Polignac number, because 255943729 - 2⁷ = 255943601 is a prime.

It is not a weakly prime, because it can be changed into another prime (255943759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127971864 + 127971865.

It is an arithmetic number, because the mean of its divisors is an integer number (127971865).

Almost surely, 2^255943729 is an apocalyptic number.

It is an amenable number.

255943729 is a deficient number, since it is larger than the sum of its proper divisors (1).

255943729 is an equidigital number, since it uses as much as digits as its factorization.

255943729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 46.

The square root of 255943729 is about 15998.2414346077. The cubic root of 255943729 is about 634.9138941257.

The spelling of 255943729 in words is "two hundred fifty-five million, nine hundred forty-three thousand, seven hundred twenty-nine".