851092987 has 2 divisors, whose sum is σ = 851092988. Its totient is φ = 851092986.

The previous prime is 851092939. The next prime is 851092997. The reversal of 851092987 is 789290158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 851092987 - 2¹¹ = 851090939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 851092987.

It is not a weakly prime, because it can be changed into another prime (851092997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425546493 + 425546494.

It is an arithmetic number, because the mean of its divisors is an integer number (425546494).

Almost surely, 2^851092987 is an apocalyptic number.

851092987 is a deficient number, since it is larger than the sum of its proper divisors (1).

851092987 is an equidigital number, since it uses as much as digits as its factorization.

851092987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 49.

The square root of 851092987 is about 29173.4980247484. The cubic root of 851092987 is about 947.6740836214.

The spelling of 851092987 in words is "eight hundred fifty-one million, ninety-two thousand, nine hundred eighty-seven".