256239359 has 2 divisors, whose sum is σ = 256239360. Its totient is φ = 256239358.

The previous prime is 256239337. The next prime is 256239367. The reversal of 256239359 is 953932652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256239359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256239329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128119679 + 128119680.

It is an arithmetic number, because the mean of its divisors is an integer number (128119680).

Almost surely, 2^256239359 is an apocalyptic number.

256239359 is a deficient number, since it is larger than the sum of its proper divisors (1).

256239359 is an equidigital number, since it uses as much as digits as its factorization.

256239359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 437400, while the sum is 44.

The square root of 256239359 is about 16007.4782211315. The cubic root of 256239359 is about 635.1582543133.

The spelling of 256239359 in words is "two hundred fifty-six million, two hundred thirty-nine thousand, three hundred fifty-nine".