9888741021 has 8 divisors (see below), whose sum is σ = 13194351360. Its totient is φ = 6587812352.

The previous prime is 9888740963. The next prime is 9888741029. The reversal of 9888741021 is 1201478889.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9888741021 - 2²⁷ = 9754523293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9888741029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165485 + ... + 1173938.

It is an arithmetic number, because the mean of its divisors is an integer number (1649293920).

Almost surely, 2^9888741021 is an apocalyptic number.

It is an amenable number.

9888741021 is a deficient number, since it is larger than the sum of its proper divisors (3305610339).

9888741021 is a wasteful number, since it uses less digits than its factorization.

9888741021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340835.

The product of its (nonzero) digits is 258048, while the sum is 48.

The square root of 9888741021 is about 99442.1491169615. The cubic root of 9888741021 is about 2146.4148667074.

The spelling of 9888741021 in words is "nine billion, eight hundred eighty-eight million, seven hundred forty-one thousand, twenty-one".