205416853 has 2 divisors, whose sum is σ = 205416854. Its totient is φ = 205416852.

The previous prime is 205416851. The next prime is 205416857. The reversal of 205416853 is 358614502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202977009 + 2439844 = 14247^2 + 1562^2 .

It is a cyclic number.

It is not a de Polignac number, because 205416853 - 2¹ = 205416851 is a prime.

Together with 205416851, 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 (205416851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102708426 + 102708427.

It is an arithmetic number, because the mean of its divisors is an integer number (102708427).

Almost surely, 2^205416853 is an apocalyptic number.

It is an amenable number.

205416853 is a deficient number, since it is larger than the sum of its proper divisors (1).

205416853 is an equidigital number, since it uses as much as digits as its factorization.

205416853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 205416853 is about 14332.3708087671. The cubic root of 205416853 is about 590.0362450203.

The spelling of 205416853 in words is "two hundred five million, four hundred sixteen thousand, eight hundred fifty-three".