985980871 has 2 divisors, whose sum is σ = 985980872. Its totient is φ = 985980870.

The previous prime is 985980731. The next prime is 985980907. The reversal of 985980871 is 178089589.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 985980871 - 2¹⁹ = 985456583 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985980371) 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, 492990435 + 492990436.

It is an arithmetic number, because the mean of its divisors is an integer number (492990436).

Almost surely, 2^985980871 is an apocalyptic number.

985980871 is a deficient number, since it is larger than the sum of its proper divisors (1).

985980871 is an equidigital number, since it uses as much as digits as its factorization.

985980871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 55.

The square root of 985980871 is about 31400.3323390056. The cubic root of 985980871 is about 995.3049479851.

The spelling of 985980871 in words is "nine hundred eighty-five million, nine hundred eighty thousand, eight hundred seventy-one".