255897613 has 2 divisors, whose sum is σ = 255897614. Its totient is φ = 255897612.

The previous prime is 255897599. The next prime is 255897637. The reversal of 255897613 is 316798552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139192804 + 116704809 = 11798^2 + 10803^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255897613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255897673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127948806 + 127948807.

It is an arithmetic number, because the mean of its divisors is an integer number (127948807).

Almost surely, 2^255897613 is an apocalyptic number.

It is an amenable number.

255897613 is a deficient number, since it is larger than the sum of its proper divisors (1).

255897613 is an equidigital number, since it uses as much as digits as its factorization.

255897613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 46.

The square root of 255897613 is about 15996.8000862673. The cubic root of 255897613 is about 634.8757588580.

The spelling of 255897613 in words is "two hundred fifty-five million, eight hundred ninety-seven thousand, six hundred thirteen".