9621997884 has 24 divisors (see below), whose sum is σ = 24945920720. Its totient is φ = 3207332592.

The previous prime is 9621997877. The next prime is 9621997897. The reversal of 9621997884 is 4887991269.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44546179 + ... + 44546394.

Almost surely, 2^9621997884 is an apocalyptic number.

It is an amenable number.

9621997884 is an abundant number, since it is smaller than the sum of its proper divisors (15323922836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9621997884 is a wasteful number, since it uses less digits than its factorization.

9621997884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89092586 (or 89092578 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 63.

The square root of 9621997884 is about 98091.7829586148. The cubic root of 9621997884 is about 2126.9392499971.

The spelling of 9621997884 in words is "nine billion, six hundred twenty-one million, nine hundred ninety-seven thousand, eight hundred eighty-four".