85117869 has 6 divisors (see below), whose sum is σ = 122948046. Its totient is φ = 56745240.

The previous prime is 85117867. The next prime is 85117913. The reversal of 85117869 is 96871158.

85117869 is a `hidden beast` number, since 8 + 511 + 78 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 82355625 + 2762244 = 9075^2 + 1662^2 .

It is not a de Polignac number, because 85117869 - 2¹ = 85117867 is a prime.

It is a super-2 number, since 2×85117869² = 14490103246202322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85117867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4728762 + ... + 4728779.

It is an arithmetic number, because the mean of its divisors is an integer number (20491341).

Almost surely, 2^85117869 is an apocalyptic number.

It is an amenable number.

85117869 is a deficient number, since it is larger than the sum of its proper divisors (37830177).

85117869 is a wasteful number, since it uses less digits than its factorization.

85117869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9457547 (or 9457544 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 85117869 is about 9225.9345868047. The cubic root of 85117869 is about 439.8861086078.

The spelling of 85117869 in words is "eighty-five million, one hundred seventeen thousand, eight hundred sixty-nine".