851136089 has 2 divisors, whose sum is σ = 851136090. Its totient is φ = 851136088.

The previous prime is 851136079. The next prime is 851136107. The reversal of 851136089 is 980631158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 834054400 + 17081689 = 28880^2 + 4133^2 .

It is a cyclic number.

It is not a de Polignac number, because 851136089 - 2⁴ = 851136073 is a prime.

It is equal to p_43637099 and since 851136089 and 43637099 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (851136079) 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, 425568044 + 425568045.

It is an arithmetic number, because the mean of its divisors is an integer number (425568045).

Almost surely, 2^851136089 is an apocalyptic number.

It is an amenable number.

851136089 is a deficient number, since it is larger than the sum of its proper divisors (1).

851136089 is an equidigital number, since it uses as much as digits as its factorization.

851136089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 851136089 is about 29174.2367338033. The cubic root of 851136089 is about 947.6900810739.

The spelling of 851136089 in words is "eight hundred fifty-one million, one hundred thirty-six thousand, eighty-nine".