85729039 has 8 divisors (see below), whose sum is σ = 93628368. Its totient is φ = 77847360.

The previous prime is 85728989. The next prime is 85729051. The reversal of 85729039 is 93092758.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85729039 - 2⁷ = 85728911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85728986 and 85729004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85729099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7059 + ... + 14875.

It is an arithmetic number, because the mean of its divisors is an integer number (11703546).

Almost surely, 2^85729039 is an apocalyptic number.

85729039 is a deficient number, since it is larger than the sum of its proper divisors (7899329).

85729039 is a wasteful number, since it uses less digits than its factorization.

85729039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 85729039 is about 9258.9977319362. The cubic root of 85729039 is about 440.9364336438.

The spelling of 85729039 in words is "eighty-five million, seven hundred twenty-nine thousand, thirty-nine".