85155929 has 6 divisors (see below), whose sum is σ = 89874090. Its totient is φ = 80673696.

The previous prime is 85155901. The next prime is 85155937. The reversal of 85155929 is 92955158.

It can be written as a sum of positive squares in only one way, i.e., 67683529 + 17472400 = 8227^2 + 4180^2 .

It is not a de Polignac number, because 85155929 - 2⁸ = 85155673 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85155929.

It is not an unprimeable number, because it can be changed into a prime (85155949) 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 5 ways as a sum of consecutive naturals, for example, 117584 + ... + 118305.

It is an arithmetic number, because the mean of its divisors is an integer number (14979015).

Almost surely, 2^85155929 is an apocalyptic number.

It is an amenable number.

85155929 is a deficient number, since it is larger than the sum of its proper divisors (4718161).

85155929 is a wasteful number, since it uses less digits than its factorization.

85155929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235927 (or 235908 counting only the distinct ones).

The product of its digits is 162000, while the sum is 44.

The square root of 85155929 is about 9227.9970199388. The cubic root of 85155929 is about 439.9516630785.

The spelling of 85155929 in words is "eighty-five million, one hundred fifty-five thousand, nine hundred twenty-nine".