9985944097 has 4 divisors (see below), whose sum is σ = 10255834516. Its totient is φ = 9716053680.

The previous prime is 9985944079. The next prime is 9985944107. The reversal of 9985944097 is 7904495899.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7871415841 + 2114528256 = 88721^2 + 45984^2 .

It is a cyclic number.

It is not a de Polignac number, because 9985944097 - 2¹¹ = 9985942049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9985944497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134945154 + ... + 134945227.

It is an arithmetic number, because the mean of its divisors is an integer number (2563958629).

Almost surely, 2^9985944097 is an apocalyptic number.

It is an amenable number.

9985944097 is a deficient number, since it is larger than the sum of its proper divisors (269890419).

9985944097 is a wasteful number, since it uses less digits than its factorization.

9985944097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269890418.

The product of its (nonzero) digits is 29393280, while the sum is 64.

The square root of 9985944097 is about 99929.6957715773. The cubic root of 9985944097 is about 2153.4247992190.

The spelling of 9985944097 in words is "nine billion, nine hundred eighty-five million, nine hundred forty-four thousand, ninety-seven".