853421111 has 2 divisors, whose sum is σ = 853421112. Its totient is φ = 853421110.

The previous prime is 853421069. The next prime is 853421113. The reversal of 853421111 is 111124358.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 853421111 - 2⁶ = 853421047 is a prime.

Together with 853421113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853421113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426710555 + 426710556.

It is an arithmetic number, because the mean of its divisors is an integer number (426710556).

Almost surely, 2^853421111 is an apocalyptic number.

853421111 is a deficient number, since it is larger than the sum of its proper divisors (1).

853421111 is an equidigital number, since it uses as much as digits as its factorization.

853421111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 26.

The square root of 853421111 is about 29213.3721264766. The cubic root of 853421111 is about 948.5374025609.

Adding to 853421111 its reverse (111124358), we get a palindrome (964545469).

The spelling of 853421111 in words is "eight hundred fifty-three million, four hundred twenty-one thousand, one hundred eleven".