851018879 has 2 divisors, whose sum is σ = 851018880. Its totient is φ = 851018878.

The previous prime is 851018803. The next prime is 851018881. The reversal of 851018879 is 978810158.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851018879 is a prime.

Together with 851018881, 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 (851018899) 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, 425509439 + 425509440.

It is an arithmetic number, because the mean of its divisors is an integer number (425509440).

Almost surely, 2^851018879 is an apocalyptic number.

851018879 is a deficient number, since it is larger than the sum of its proper divisors (1).

851018879 is an equidigital number, since it uses as much as digits as its factorization.

851018879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 47.

The square root of 851018879 is about 29172.2278717276. The cubic root of 851018879 is about 947.6465769249.

The spelling of 851018879 in words is "eight hundred fifty-one million, eighteen thousand, eight hundred seventy-nine".