985305993 has 16 divisors (see below), whose sum is σ = 1566698496. Its totient is φ = 538552080.

The previous prime is 985305991. The next prime is 985306013. The reversal of 985305993 is 399503589.

It is not a de Polignac number, because 985305993 - 2¹ = 985305991 is a prime.

It is a super-4 number, since 4×985305993⁴ (a number of 37 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (985305991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1019503 + ... + 1020468.

It is an arithmetic number, because the mean of its divisors is an integer number (97918656).

Almost surely, 2^985305993 is an apocalyptic number.

It is an amenable number.

985305993 is a deficient number, since it is larger than the sum of its proper divisors (581392503).

985305993 is a wasteful number, since it uses less digits than its factorization.

985305993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040004.

The product of its (nonzero) digits is 1312200, while the sum is 51.

The square root of 985305993 is about 31389.5841482489. The cubic root of 985305993 is about 995.0778094585.

The spelling of 985305993 in words is "nine hundred eighty-five million, three hundred five thousand, nine hundred ninety-three".