85597989 has 8 divisors (see below), whose sum is σ = 114240000. Its totient is φ = 57010656.

The previous prime is 85597943. The next prime is 85597997. The reversal of 85597989 is 98979558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85597989 - 2¹³ = 85589797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85597999) 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 7 ways as a sum of consecutive naturals, for example, 9864 + ... + 16385.

It is an arithmetic number, because the mean of its divisors is an integer number (14280000).

Almost surely, 2^85597989 is an apocalyptic number.

It is an amenable number.

85597989 is a deficient number, since it is larger than the sum of its proper divisors (28642011).

85597989 is a wasteful number, since it uses less digits than its factorization.

85597989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27339.

The product of its digits is 8164800, while the sum is 60.

The square root of 85597989 is about 9251.9181254484. The cubic root of 85597989 is about 440.7116393788.

The spelling of 85597989 in words is "eighty-five million, five hundred ninety-seven thousand, nine hundred eighty-nine".