9721911093 has 4 divisors (see below), whose sum is σ = 12962548128. Its totient is φ = 6481274060.

The previous prime is 9721911071. The next prime is 9721911113. The reversal of 9721911093 is 3901191279.

9721911093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9721911093 - 2²⁹ = 9185040181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9721913093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620318513 + ... + 1620318518.

It is an arithmetic number, because the mean of its divisors is an integer number (3240637032).

Almost surely, 2^9721911093 is an apocalyptic number.

It is an amenable number.

9721911093 is a deficient number, since it is larger than the sum of its proper divisors (3240637035).

9721911093 is a wasteful number, since it uses less digits than its factorization.

9721911093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240637034.

The product of its (nonzero) digits is 30618, while the sum is 42.

The square root of 9721911093 is about 98599.7519925887. The cubic root of 9721911093 is about 2134.2758408925.

The spelling of 9721911093 in words is "nine billion, seven hundred twenty-one million, nine hundred eleven thousand, ninety-three".