85894789 has 2 divisors, whose sum is σ = 85894790. Its totient is φ = 85894788.

The previous prime is 85894777. The next prime is 85894819. The reversal of 85894789 is 98749858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64272289 + 21622500 = 8017^2 + 4650^2 .

It is a cyclic number.

It is not a de Polignac number, because 85894789 - 2⁷ = 85894661 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85894729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42947394 + 42947395.

It is an arithmetic number, because the mean of its divisors is an integer number (42947395).

Almost surely, 2^85894789 is an apocalyptic number.

It is an amenable number.

85894789 is a deficient number, since it is larger than the sum of its proper divisors (1).

85894789 is an equidigital number, since it uses as much as digits as its factorization.

85894789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 58.

The square root of 85894789 is about 9267.9441625422. The cubic root of 85894789 is about 441.2204220638.

The spelling of 85894789 in words is "eighty-five million, eight hundred ninety-four thousand, seven hundred eighty-nine".