851135911 has 2 divisors, whose sum is σ = 851135912. Its totient is φ = 851135910.

The previous prime is 851135903. The next prime is 851135917. The reversal of 851135911 is 119531158.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 851135911 - 2³ = 851135903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851135917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425567955 + 425567956.

It is an arithmetic number, because the mean of its divisors is an integer number (425567956).

Almost surely, 2^851135911 is an apocalyptic number.

851135911 is a deficient number, since it is larger than the sum of its proper divisors (1).

851135911 is an equidigital number, since it uses as much as digits as its factorization.

851135911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 34.

The square root of 851135911 is about 29174.2336831664. The cubic root of 851135911 is about 947.6900150097.

The spelling of 851135911 in words is "eight hundred fifty-one million, one hundred thirty-five thousand, nine hundred eleven".