255679 has 2 divisors, whose sum is σ = 255680. Its totient is φ = 255678.

The previous prime is 255667. The next prime is 255709. The reversal of 255679 is 976552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255679 - 2⁷ = 255551 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127839 + 127840.

It is an arithmetic number, because the mean of its divisors is an integer number (127840).

2²⁵⁵⁶⁷⁹ is an apocalyptic number.

255679 is a deficient number, since it is larger than the sum of its proper divisors (1).

255679 is an equidigital number, since it uses as much as digits as its factorization.

255679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 34.

The square root of 255679 is about 505.6471101470. The cubic root of 255679 is about 63.4694916170.

The spelling of 255679 in words is "two hundred fifty-five thousand, six hundred seventy-nine".