85729389 has 8 divisors (see below), whose sum is σ = 114592512. Its totient is φ = 57009600.

The previous prime is 85729373. The next prime is 85729393. The reversal of 85729389 is 98392758.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85729389 - 2⁴ = 85729373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85729789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34429 + ... + 36834.

It is an arithmetic number, because the mean of its divisors is an integer number (14324064).

Almost surely, 2^85729389 is an apocalyptic number.

It is an amenable number.

85729389 is a deficient number, since it is larger than the sum of its proper divisors (28863123).

85729389 is a wasteful number, since it uses less digits than its factorization.

85729389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71667.

The product of its digits is 1088640, while the sum is 51.

The square root of 85729389 is about 9259.0166324508. The cubic root of 85729389 is about 440.9370337032.

The spelling of 85729389 in words is "eighty-five million, seven hundred twenty-nine thousand, three hundred eighty-nine".