255800639 has 2 divisors, whose sum is σ = 255800640. Its totient is φ = 255800638.

The previous prime is 255800617. The next prime is 255800669. The reversal of 255800639 is 936008552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255800639 - 2⁸ = 255800383 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255800669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127900319 + 127900320.

It is an arithmetic number, because the mean of its divisors is an integer number (127900320).

Almost surely, 2^255800639 is an apocalyptic number.

255800639 is a deficient number, since it is larger than the sum of its proper divisors (1).

255800639 is an equidigital number, since it uses as much as digits as its factorization.

255800639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 255800639 is about 15993.7687553622. The cubic root of 255800639 is about 634.7955520131.

The spelling of 255800639 in words is "two hundred fifty-five million, eight hundred thousand, six hundred thirty-nine".