9911397137 has 8 divisors (see below), whose sum is σ = 10515047400. Its totient is φ = 9310038784.

The previous prime is 9911397073. The next prime is 9911397169. The reversal of 9911397137 is 7317931199.

It is a happy number.

9911397137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 99556²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 7716568336 + 2194828801 = 87844^2 + 46849^2 .

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 9911397137 - 2⁶ = 9911397073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9911393137) 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 7 ways as a sum of consecutive naturals, for example, 564062 + ... + 581367.

It is an arithmetic number, because the mean of its divisors is an integer number (1314380925).

Almost surely, 2^9911397137 is an apocalyptic number.

It is an amenable number.

9911397137 is a deficient number, since it is larger than the sum of its proper divisors (603650263).

9911397137 is a wasteful number, since it uses less digits than its factorization.

9911397137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145955.

The product of its digits is 321489, while the sum is 50.

The square root of 9911397137 is about 99556.0000050223. Note that the first 5 decimals coincide. The cubic root of 9911397137 is about 2148.0528350114.

The spelling of 9911397137 in words is "nine billion, nine hundred eleven million, three hundred ninety-seven thousand, one hundred thirty-seven".