9971551793 has 6 divisors (see below), whose sum is σ = 11599560306. Its totient is φ = 8547044352.

The previous prime is 9971551789. The next prime is 9971551801. The reversal of 9971551793 is 3971551799.

It can be written as a sum of positive squares in only one way, i.e., 6467858929 + 3503692864 = 80423^2 + 59192^2 .

It is not a de Polignac number, because 9971551793 - 2² = 9971551789 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9971550793) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101750480 + ... + 101750577.

It is an arithmetic number, because the mean of its divisors is an integer number (1933260051).

Almost surely, 2^9971551793 is an apocalyptic number.

It is an amenable number.

9971551793 is a deficient number, since it is larger than the sum of its proper divisors (1628008513).

9971551793 is a wasteful number, since it uses less digits than its factorization.

9971551793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203501071 (or 203501064 counting only the distinct ones).

The product of its digits is 2679075, while the sum is 56.

The square root of 9971551793 is about 99857.6576582888. The cubic root of 9971551793 is about 2152.3897561799.

The spelling of 9971551793 in words is "nine billion, nine hundred seventy-one million, five hundred fifty-one thousand, seven hundred ninety-three".