989585983 has 2 divisors, whose sum is σ = 989585984. Its totient is φ = 989585982.

The previous prime is 989585977. The next prime is 989586011. The reversal of 989585983 is 389585989.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989585983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989585903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494792991 + 494792992.

It is an arithmetic number, because the mean of its divisors is an integer number (494792992).

Almost surely, 2^989585983 is an apocalyptic number.

989585983 is a deficient number, since it is larger than the sum of its proper divisors (1).

989585983 is an equidigital number, since it uses as much as digits as its factorization.

989585983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27993600, while the sum is 64.

The square root of 989585983 is about 31457.6855950974. The cubic root of 989585983 is about 996.5165406006.

The spelling of 989585983 in words is "nine hundred eighty-nine million, five hundred eighty-five thousand, nine hundred eighty-three".