85555993 has 8 divisors (see below), whose sum is σ = 90208800. Its totient is φ = 80918208.

The previous prime is 85555991. The next prime is 85555997. The reversal of 85555993 is 39955558.

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

It is a cyclic number.

It is not a de Polignac number, because 85555993 - 2¹ = 85555991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85555991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9105 + ... + 15937.

It is an arithmetic number, because the mean of its divisors is an integer number (11276100).

Almost surely, 2^85555993 is an apocalyptic number.

It is an amenable number.

85555993 is a deficient number, since it is larger than the sum of its proper divisors (4652807).

85555993 is a wasteful number, since it uses less digits than its factorization.

85555993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7511.

The product of its digits is 1215000, while the sum is 49.

The square root of 85555993 is about 9249.6482635828. The cubic root of 85555993 is about 440.6395537536.

The spelling of 85555993 in words is "eighty-five million, five hundred fifty-five thousand, nine hundred ninety-three".