85817069 has 4 divisors (see below), whose sum is σ = 92418396. Its totient is φ = 79215744.

The previous prime is 85817051. The next prime is 85817077. The reversal of 85817069 is 96071858.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96071858 = 2 ⋅48035929.

It can be written as a sum of positive squares in 2 ways, for example, as 5929225 + 79887844 = 2435^2 + 8938^2 .

It is a cyclic number.

It is not a de Polignac number, because 85817069 - 2¹² = 85812973 is a prime.

It is a super-2 number, since 2×85817069² = 14729138663501522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85817009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3300644 + ... + 3300669.

It is an arithmetic number, because the mean of its divisors is an integer number (23104599).

Almost surely, 2^85817069 is an apocalyptic number.

It is an amenable number.

85817069 is a deficient number, since it is larger than the sum of its proper divisors (6601327).

85817069 is a wasteful number, since it uses less digits than its factorization.

85817069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6601326.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 85817069 is about 9263.7502664957. The cubic root of 85817069 is about 441.0873057266.

The spelling of 85817069 in words is "eighty-five million, eight hundred seventeen thousand, sixty-nine".