256517683 has 2 divisors, whose sum is σ = 256517684. Its totient is φ = 256517682.

The previous prime is 256517647. The next prime is 256517699. The reversal of 256517683 is 386715652.

256517683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256517683 - 2²¹ = 254420531 is a prime.

It is not a weakly prime, because it can be changed into another prime (256517623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128258841 + 128258842.

It is an arithmetic number, because the mean of its divisors is an integer number (128258842).

Almost surely, 2^256517683 is an apocalyptic number.

256517683 is a deficient number, since it is larger than the sum of its proper divisors (1).

256517683 is an equidigital number, since it uses as much as digits as its factorization.

256517683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The square root of 256517683 is about 16016.1694234296. The cubic root of 256517683 is about 635.3881380958.

The spelling of 256517683 in words is "two hundred fifty-six million, five hundred seventeen thousand, six hundred eighty-three".