255676909 has 2 divisors, whose sum is σ = 255676910. Its totient is φ = 255676908.

The previous prime is 255676907. The next prime is 255676921. The reversal of 255676909 is 909676552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150552900 + 105124009 = 12270^2 + 10253^2 .

It is a cyclic number.

It is not a de Polignac number, because 255676909 - 2¹ = 255676907 is a prime.

Together with 255676907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255676907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127838454 + 127838455.

It is an arithmetic number, because the mean of its divisors is an integer number (127838455).

Almost surely, 2^255676909 is an apocalyptic number.

It is an amenable number.

255676909 is a deficient number, since it is larger than the sum of its proper divisors (1).

255676909 is an equidigital number, since it uses as much as digits as its factorization.

255676909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1020600, while the sum is 49.

The square root of 255676909 is about 15989.9002185755. The cubic root of 255676909 is about 634.6931859400.

The spelling of 255676909 in words is "two hundred fifty-five million, six hundred seventy-six thousand, nine hundred nine".