85839389 has 2 divisors, whose sum is σ = 85839390. Its totient is φ = 85839388.

The previous prime is 85839379. The next prime is 85839407. The reversal of 85839389 is 98393858.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74563225 + 11276164 = 8635^2 + 3358^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85839389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85839389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85839329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42919694 + 42919695.

It is an arithmetic number, because the mean of its divisors is an integer number (42919695).

Almost surely, 2^85839389 is an apocalyptic number.

It is an amenable number.

85839389 is a deficient number, since it is larger than the sum of its proper divisors (1).

85839389 is an equidigital number, since it uses as much as digits as its factorization.

85839389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 53.

The square root of 85839389 is about 9264.9548838621. The cubic root of 85839389 is about 441.1255429342.

The spelling of 85839389 in words is "eighty-five million, eight hundred thirty-nine thousand, three hundred eighty-nine".