85983120989 has 2 divisors, whose sum is σ = 85983120990. Its totient is φ = 85983120988.

The previous prime is 85983120967. The next prime is 85983120991. The reversal of 85983120989 is 98902138958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64030253764 + 21952867225 = 253042^2 + 148165^2 .

It is a cyclic number.

It is not a de Polignac number, because 85983120989 - 2²⁰ = 85982072413 is a prime.

Together with 85983120991, 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 (85983120389) 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, 42991560494 + 42991560495.

It is an arithmetic number, because the mean of its divisors is an integer number (42991560495).

Almost surely, 2^85983120989 is an apocalyptic number.

It is an amenable number.

85983120989 is a deficient number, since it is larger than the sum of its proper divisors (1).

85983120989 is an equidigital number, since it uses as much as digits as its factorization.

85983120989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11197440, while the sum is 62.

The spelling of 85983120989 in words is "eighty-five billion, nine hundred eighty-three million, one hundred twenty thousand, nine hundred eighty-nine".