855404411 has 2 divisors, whose sum is σ = 855404412. Its totient is φ = 855404410.

The previous prime is 855404393. The next prime is 855404413. The reversal of 855404411 is 114404558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855404411 is a prime.

Together with 855404413, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (855404413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427702205 + 427702206.

It is an arithmetic number, because the mean of its divisors is an integer number (427702206).

Almost surely, 2^855404411 is an apocalyptic number.

855404411 is a deficient number, since it is larger than the sum of its proper divisors (1).

855404411 is an equidigital number, since it uses as much as digits as its factorization.

855404411 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 855404411 is about 29247.2974990853. The cubic root of 855404411 is about 949.2716156368.

Adding to 855404411 its reverse (114404558), we get a palindrome (969808969).

The spelling of 855404411 in words is "eight hundred fifty-five million, four hundred four thousand, four hundred eleven".