985430671 has 2 divisors, whose sum is σ = 985430672. Its totient is φ = 985430670.

The previous prime is 985430669. The next prime is 985430711. The reversal of 985430671 is 176034589.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 985430671 - 2¹ = 985430669 is a prime.

Together with 985430669, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985430651) 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, 492715335 + 492715336.

It is an arithmetic number, because the mean of its divisors is an integer number (492715336).

Almost surely, 2^985430671 is an apocalyptic number.

985430671 is the 16780-th centered heptagonal number.

985430671 is a deficient number, since it is larger than the sum of its proper divisors (1).

985430671 is an equidigital number, since it uses as much as digits as its factorization.

985430671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 985430671 is about 31391.5700626777. The cubic root of 985430671 is about 995.1197791882.

The spelling of 985430671 in words is "nine hundred eighty-five million, four hundred thirty thousand, six hundred seventy-one".