85606309 has 4 divisors (see below), whose sum is σ = 85811040. Its totient is φ = 85401580.

The previous prime is 85606247. The next prime is 85606349. The reversal of 85606309 is 90360658.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90360658 = 2 ⋅45180329.

It is a cyclic number.

It is not a de Polignac number, because 85606309 - 2⁷ = 85606181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85606349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101737 + ... + 102574.

It is an arithmetic number, because the mean of its divisors is an integer number (21452760).

Almost surely, 2^85606309 is an apocalyptic number.

It is an amenable number.

85606309 is a deficient number, since it is larger than the sum of its proper divisors (204731).

85606309 is a wasteful number, since it uses less digits than its factorization.

85606309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204730.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 85606309 is about 9252.3677510138. The cubic root of 85606309 is about 440.7259177596.

The spelling of 85606309 in words is "eighty-five million, six hundred six thousand, three hundred nine".