255435409 has 2 divisors, whose sum is σ = 255435410. Its totient is φ = 255435408.

The previous prime is 255435407. The next prime is 255435431. The reversal of 255435409 is 904534552.

255435409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255104784 + 330625 = 15972^2 + 575^2 .

It is a cyclic number.

It is not a de Polignac number, because 255435409 - 2¹ = 255435407 is a prime.

Together with 255435407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (255435407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127717704 + 127717705.

It is an arithmetic number, because the mean of its divisors is an integer number (127717705).

Almost surely, 2^255435409 is an apocalyptic number.

It is an amenable number.

255435409 is a deficient number, since it is larger than the sum of its proper divisors (1).

255435409 is an equidigital number, since it uses as much as digits as its factorization.

255435409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 255435409 is about 15982.3467926334. The cubic root of 255435409 is about 634.4932895289.

The spelling of 255435409 in words is "two hundred fifty-five million, four hundred thirty-five thousand, four hundred nine".