85004798789 has 2 divisors, whose sum is σ = 85004798790. Its totient is φ = 85004798788.

The previous prime is 85004798729. The next prime is 85004798831. The reversal of 85004798789 is 98789740058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80375085025 + 4629713764 = 283505^2 + 68042^2 .

It is a cyclic number.

It is not a de Polignac number, because 85004798789 - 2²⁸ = 84736363333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85004798729) 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, 42502399394 + 42502399395.

It is an arithmetic number, because the mean of its divisors is an integer number (42502399395).

Almost surely, 2^85004798789 is an apocalyptic number.

It is an amenable number.

85004798789 is a deficient number, since it is larger than the sum of its proper divisors (1).

85004798789 is an equidigital number, since it uses as much as digits as its factorization.

85004798789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40642560, while the sum is 65.

The spelling of 85004798789 in words is "eighty-five billion, four million, seven hundred ninety-eight thousand, seven hundred eighty-nine".