9938391085 has 16 divisors (see below), whose sum is σ = 14347152000. Its totient is φ = 6456217536.

The previous prime is 9938391083. The next prime is 9938391107. The reversal of 9938391085 is 5801938399.

It is a cyclic number.

It is not a de Polignac number, because 9938391085 - 2¹ = 9938391083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9938391083) 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, 7471810 + ... + 7473139.

It is an arithmetic number, because the mean of its divisors is an integer number (896697000).

Almost surely, 2^9938391085 is an apocalyptic number.

9938391085 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9938391085 is a deficient number, since it is larger than the sum of its proper divisors (4408760915).

9938391085 is a wasteful number, since it uses less digits than its factorization.

9938391085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14944980.

The product of its (nonzero) digits is 2099520, while the sum is 55.

The square root of 9938391085 is about 99691.4795005070. The cubic root of 9938391085 is about 2150.0011599056.

The spelling of 9938391085 in words is "nine billion, nine hundred thirty-eight million, three hundred ninety-one thousand, eighty-five".