85869123 has 4 divisors (see below), whose sum is σ = 114492168. Its totient is φ = 57246080.

The previous prime is 85869071. The next prime is 85869137. The reversal of 85869123 is 32196858.

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

It is a cyclic number.

It is not a de Polignac number, because 85869123 - 2¹⁸ = 85606979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85869523) 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 3 ways as a sum of consecutive naturals, for example, 14311518 + ... + 14311523.

It is an arithmetic number, because the mean of its divisors is an integer number (28623042).

Almost surely, 2^85869123 is an apocalyptic number.

85869123 is a deficient number, since it is larger than the sum of its proper divisors (28623045).

85869123 is a wasteful number, since it uses less digits than its factorization.

85869123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28623044.

The product of its digits is 103680, while the sum is 42.

The square root of 85869123 is about 9266.5593938635. The cubic root of 85869123 is about 441.1764710410.

The spelling of 85869123 in words is "eighty-five million, eight hundred sixty-nine thousand, one hundred twenty-three".