9939972117 has 16 divisors (see below), whose sum is σ = 13356222912. Its totient is φ = 6575230080.

The previous prime is 9939972109. The next prime is 9939972127. The reversal of 9939972117 is 7112799399.

It is not a de Polignac number, because 9939972117 - 2³ = 9939972109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9939972127) 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, 1194742 + ... + 1203032.

It is an arithmetic number, because the mean of its divisors is an integer number (834763932).

Almost surely, 2^9939972117 is an apocalyptic number.

It is an amenable number.

9939972117 is a deficient number, since it is larger than the sum of its proper divisors (3416250795).

9939972117 is a wasteful number, since it uses less digits than its factorization.

9939972117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11348.

The product of its digits is 1928934, while the sum is 57.

The square root of 9939972117 is about 99699.4088096815. The cubic root of 9939972117 is about 2150.1151636167.

The spelling of 9939972117 in words is "nine billion, nine hundred thirty-nine million, nine hundred seventy-two thousand, one hundred seventeen".