9197985973 has 16 divisors (see below), whose sum is σ = 10230900480. Its totient is φ = 8267746080.

The previous prime is 9197985971. The next prime is 9197986001. The reversal of 9197985973 is 3795897919.

It is not a de Polignac number, because 9197985973 - 2¹ = 9197985971 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9197985899 and 9197985908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9197985971) 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, 79636 + ... + 157282.

It is an arithmetic number, because the mean of its divisors is an integer number (639431280).

Almost surely, 2^9197985973 is an apocalyptic number.

It is an amenable number.

9197985973 is a deficient number, since it is larger than the sum of its proper divisors (1032914507).

9197985973 is an equidigital number, since it uses as much as digits as its factorization.

9197985973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77769 (or 77747 counting only the distinct ones).

The product of its digits is 38578680, while the sum is 67.

The square root of 9197985973 is about 95906.1310501054. The cubic root of 9197985973 is about 2095.2261911953.

The spelling of 9197985973 in words is "nine billion, one hundred ninety-seven million, nine hundred eighty-five thousand, nine hundred seventy-three".