85816069 has 4 divisors (see below), whose sum is σ = 85889196. Its totient is φ = 85742944.

The previous prime is 85816007. The next prime is 85816117. The reversal of 85816069 is 96061858.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15507844 + 70308225 = 3938^2 + 8385^2 .

It is a cyclic number.

It is not a de Polignac number, because 85816069 - 2¹¹ = 85814021 is a prime.

It is a super-2 number, since 2×85816069² = 14728795397225522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85816469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34774 + ... + 37159.

It is an arithmetic number, because the mean of its divisors is an integer number (21472299).

Almost surely, 2^85816069 is an apocalyptic number.

It is an amenable number.

85816069 is a deficient number, since it is larger than the sum of its proper divisors (73127).

85816069 is a wasteful number, since it uses less digits than its factorization.

85816069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73126.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 85816069 is about 9263.6962925174. The cubic root of 85816069 is about 441.0855924349.

The spelling of 85816069 in words is "eighty-five million, eight hundred sixteen thousand, sixty-nine".