85156039 has 16 divisors (see below), whose sum is σ = 90686464. Its totient is φ = 79833600.

The previous prime is 85156031. The next prime is 85156067. The reversal of 85156039 is 93065158.

It is a cyclic number.

It is not a de Polignac number, because 85156039 - 2³ = 85156031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85155989 and 85156007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85156031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257104 + ... + 257434.

It is an arithmetic number, because the mean of its divisors is an integer number (5667904).

Almost surely, 2^85156039 is an apocalyptic number.

85156039 is a deficient number, since it is larger than the sum of its proper divisors (5530425).

85156039 is a wasteful number, since it uses less digits than its factorization.

85156039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 85156039 is about 9228.0029800602. The cubic root of 85156039 is about 439.9518525140.

The spelling of 85156039 in words is "eighty-five million, one hundred fifty-six thousand, thirty-nine".