85598109 has 12 divisors (see below), whose sum is σ = 123753916. Its totient is φ = 57013632.

The previous prime is 85598087. The next prime is 85598113. The reversal of 85598109 is 90189558.

It can be written as a sum of positive squares in 2 ways, for example, as 43956900 + 41641209 = 6630^2 + 6453^2 .

It is a de Polignac number, because none of the positive numbers 2^k-85598109 is a prime.

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 (85598209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8007 + ... + 15339.

Almost surely, 2^85598109 is an apocalyptic number.

It is an amenable number.

85598109 is a deficient number, since it is larger than the sum of its proper divisors (38155807).

85598109 is a wasteful number, since it uses less digits than its factorization.

85598109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8636 (or 8633 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 85598109 is about 9251.9246105878. The cubic root of 85598109 is about 440.7118453236.

The spelling of 85598109 in words is "eighty-five million, five hundred ninety-eight thousand, one hundred nine".