255705939 has 6 divisors (see below), whose sum is σ = 369353036. Its totient is φ = 170470620.

The previous prime is 255705917. The next prime is 255705943. The reversal of 255705939 is 939507552.

255705939 is a `hidden beast` number, since 2 + 5 + 57 + 0 + 593 + 9 = 666.

It is not a de Polignac number, because 255705939 - 2¹² = 255701843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255705894 and 255705903.

It is not an unprimeable number, because it can be changed into a prime (255705139) 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 in 5 ways as a sum of consecutive naturals, for example, 14205877 + ... + 14205894.

Almost surely, 2^255705939 is an apocalyptic number.

255705939 is a deficient number, since it is larger than the sum of its proper divisors (113647097).

255705939 is a wasteful number, since it uses less digits than its factorization.

255705939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28411777 (or 28411774 counting only the distinct ones).

The product of its (nonzero) digits is 425250, while the sum is 45.

The square root of 255705939 is about 15990.8079533212. The cubic root of 255705939 is about 634.7172064195.

The spelling of 255705939 in words is "two hundred fifty-five million, seven hundred five thousand, nine hundred thirty-nine".