9948715921 has 8 divisors (see below), whose sum is σ = 10012423040. Its totient is φ = 9885041712.

The previous prime is 9948715891. The next prime is 9948715937. The reversal of 9948715921 is 1295178499.

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 9948715921 - 2⁹ = 9948715409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9948715961) 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, 946531 + ... + 956983.

It is an arithmetic number, because the mean of its divisors is an integer number (1251552880).

Almost surely, 2^9948715921 is an apocalyptic number.

It is an amenable number.

9948715921 is a deficient number, since it is larger than the sum of its proper divisors (63707119).

9948715921 is a wasteful number, since it uses less digits than its factorization.

9948715921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16455.

The product of its digits is 1632960, while the sum is 55.

The square root of 9948715921 is about 99743.2500021931. The cubic root of 9948715921 is about 2150.7454361984.

The spelling of 9948715921 in words is "nine billion, nine hundred forty-eight million, seven hundred fifteen thousand, nine hundred twenty-one".