9721471340 has 24 divisors (see below), whose sum is σ = 23331531552. Its totient is φ = 3333075840.

The previous prime is 9721471313. The next prime is 9721471343. The reversal of 9721471340 is 431741279.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 9721471294 and 9721471303.

It is not an unprimeable number, because it can be changed into a prime (9721471343) 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, 34719401 + ... + 34719680.

It is an arithmetic number, because the mean of its divisors is an integer number (972147148).

Almost surely, 2^9721471340 is an apocalyptic number.

It is an amenable number.

9721471340 is an abundant number, since it is smaller than the sum of its proper divisors (13610060212).

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

9721471340 is a wasteful number, since it uses less digits than its factorization.

9721471340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69439097 (or 69439095 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 9721471340 is about 98597.5219769747. The cubic root of 9721471340 is about 2134.2436603762.

The spelling of 9721471340 in words is "nine billion, seven hundred twenty-one million, four hundred seventy-one thousand, three hundred forty".