9972917884 has 6 divisors (see below), whose sum is σ = 17452606304. Its totient is φ = 4986458940.

The previous prime is 9972917879. The next prime is 9972917887. The reversal of 9972917884 is 4887192799.

It is a happy number.

It is a super-2 number, since 2×9972917884² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9972917887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1246614732 + ... + 1246614739.

Almost surely, 2^9972917884 is an apocalyptic number.

It is an amenable number.

9972917884 is a deficient number, since it is larger than the sum of its proper divisors (7479688420).

9972917884 is a wasteful number, since it uses less digits than its factorization.

9972917884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2493229475 (or 2493229473 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 64.

The square root of 9972917884 is about 99864.4976155190. The cubic root of 9972917884 is about 2152.4880433228.

The spelling of 9972917884 in words is "nine billion, nine hundred seventy-two million, nine hundred seventeen thousand, eight hundred eighty-four".