85328009 has 4 divisors (see below), whose sum is σ = 91891716. Its totient is φ = 78764304.

The previous prime is 85327969. The next prime is 85328041. The reversal of 85328009 is 90082358.

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 18088009 + 67240000 = 4253^2 + 8200^2 .

It is a cyclic number.

It is not a de Polignac number, because 85328009 - 2¹² = 85323913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85328009.

It is not an unprimeable number, because it can be changed into a prime (85328059) 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, 3281834 + ... + 3281859.

It is an arithmetic number, because the mean of its divisors is an integer number (22972929).

Almost surely, 2^85328009 is an apocalyptic number.

It is an amenable number.

85328009 is a deficient number, since it is larger than the sum of its proper divisors (6563707).

85328009 is a wasteful number, since it uses less digits than its factorization.

85328009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563706.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 85328009 is about 9237.3161145432. The cubic root of 85328009 is about 440.2478097865.

The spelling of 85328009 in words is "eighty-five million, three hundred twenty-eight thousand, nine".