85384396789 has 2 divisors, whose sum is σ = 85384396790. Its totient is φ = 85384396788.

The previous prime is 85384396787. The next prime is 85384396813. The reversal of 85384396789 is 98769348358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51742600900 + 33641795889 = 227470^2 + 183417^2 .

It is a cyclic number.

It is not a de Polignac number, because 85384396789 - 2¹ = 85384396787 is a prime.

Together with 85384396787, 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 (85384396787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42692198394 + 42692198395.

It is an arithmetic number, because the mean of its divisors is an integer number (42692198395).

Almost surely, 2^85384396789 is an apocalyptic number.

It is an amenable number.

85384396789 is a deficient number, since it is larger than the sum of its proper divisors (1).

85384396789 is an equidigital number, since it uses as much as digits as its factorization.

85384396789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 313528320, while the sum is 70.

The spelling of 85384396789 in words is "eighty-five billion, three hundred eighty-four million, three hundred ninety-six thousand, seven hundred eighty-nine".